US 8579710

Here's a concise summary of US patent 8579710:

US Patent 8579710: Systems and methods of virtual goods trading using ratings to ascribe value to virtual goods

• Title: Systems and methods of virtual goods trading using ratings to ascribe value to virtual goods
• Current Assignee: ImagineAR Inc.
• Original Assignee: XMG Studio Inc.
• Inventors: Oliver (Lake) Watkins, JR., Yousuf Chowdhary, Jeffrey Brunet, Ravinder (“Ray”) Sharma
• Filing Date: January 18, 2012
• Issue Date: November 12, 2013
• Abstract: A method is provided for trading virtual goods. A game environment is provided in which a first player can acquire or develop a virtual good. This virtual good has a starting value. At least one rating of the virtual good is received from a second player via the game environment. The starting value is automatically increased or decreased as a function of the at least one rating of the virtual good. The virtual good is then made available for purchase at the new value. A system for trading virtual goods is also provided.

Plain-Language Overview of Independent Claims:

• Independent Claim 1 (Method Claim):
  This claim describes a method for trading virtual goods within a video game. It involves a computing device and storage. A first player can acquire or create a virtual good that has an initial value, which is stored. A second player provides a rating for this virtual good, and this rating is also stored. The computer then automatically adjusts the virtual good's value (increasing or decreasing it) based on the received rating, and stores this new value. An interface then displays the virtual good for purchase at this new value. A key aspect is that when a player requests to buy the virtual good, the system checks if that player previously rated the virtual good before allowing the purchase to proceed.

• Independent Claim 15 (System Claim):
  This claim describes a computer-implemented system for trading virtual goods, including a game engine and a storage medium. The game engine is designed to provide a game environment where players can acquire or create virtual goods with a starting value. The game engine receives ratings for these virtual goods from other players and automatically adjusts the virtual good's value based on these ratings. The system then makes the virtual good available for purchase at its updated value. Critically, the game engine is also programmed to check if a player requesting to purchase a virtual good had previously rated it before permitting the sale. The storage medium is connected to the game engine and is responsible for storing the virtual good's initial value, the received ratings, and the new, adjusted value.

CAFC 2026 Dockets:
The provided patent information indicates that US Patent 8579710 is involved in litigation at the Court of Appeals for the Federal Circuit under case number 26-1720. Specific details regarding the current status or proceedings of this particular case are not available from general public docket searches at this time.

Here is a list of known litigation involving US patent 8579710:

1. ImagineAR, Inc. et al. v. Niantic, Inc.

   • Plaintiff(s): ImagineAR, Inc. and Imagine AR, Inc.
   • Defendant(s): Niantic, Inc.
   • Jurisdiction: U.S. District Court for the District of Delaware
   • Case Number: 1:24-cv-01252-JDW
   • Filing Date: November 13, 2024
   • Current Status/Outcome: As of September 10, 2025, the court granted a motion to dismiss several patent claims asserted against Niantic, finding them to be directed to patent-ineligible abstract ideas. This dismissal pertained to three challenged patents on invalidity grounds and pre-suit damages claims for the remaining patents. An order from November 19, 2025, regarding an unopposed motion to file under seal, indicates the case was still active as of that date.

2. Appeal at the Court of Appeals for the Federal Circuit

   • Plaintiff(s): Not explicitly detailed in the provided search results.
   • Defendant(s): Not explicitly detailed in the provided search results.
   • Jurisdiction: Court of Appeals for the Federal Circuit
   • Case Number: 26-1720
   • Filing Date: Not explicitly detailed in the provided search results.
   • Current Status/Outcome: This case is noted as an appeal. Specific details regarding its current status or outcome are not available from the provided search results at this time.

Proceedings overview

There is no PTAB activity on file for US Patent 8579710.

Strategic summary

As of today, 2026-05-30, there are no AIA trial proceedings (IPR, PGR, or CBM) on file for US Patent 8579710. This means that all claims of the patent (claims 1-24) remain untested by the PTAB. There is no estoppel landscape to consider as no prior art grounds have been challenged or adjudicated at the PTAB.

Recommended next steps

If you are a defendant facing assertion of US Patent 8579710, the absence of PTAB activity suggests that the patent claims have not been challenged via AIA trials. This could mean that potential petitioners have not yet found sufficient prior art to warrant a challenge, or that previous challenges (if any were filed and dismissed before institution) are not publicly indexed. Given the patent's active litigation status in the Federal Circuit (case 26-1720), investigating potential prior art for an IPR or PGR may be a prudent defensive step.

Inventors

The inventors named on US Patent 8579710 are Oliver (Lake) Watkins, JR., Yousuf Chowdhary, Jeffrey Brunet, and Ravinder (“Ray”) Sharma. At the time of filing (January 18, 2012), all inventors were associated with XMG Studio Inc., which was the original assignee. Ray Sharma was the founder of XMG Studio Inc..

Original assignee

The original assignee listed on the issued patent is XMG Studio Inc. XMG Studio Inc. was a mobile game developer based in Toronto, Canada, founded in 2009. They developed games for iOS, Android, and Windows Phone platforms, including "Fashion Star Boutique" and "Drag Racer World," and also co-produced projects like "Degrassi" and "Ghostbusters: Paranormal Blast". Given their business as a mobile game developer and the patent's focus on virtual goods trading in video games, it is highly probable they shipped products embodying the claims. The company became inactive on social media in late 2016 and was acquired by Highmark Interactive in June 2017. Therefore, XMG Studio Inc. is no longer an operating entity under its original name and business.

Assignment timeline

• 2012-05-24 to 2012-05-28 (executed) / recorded 2012-05-31 — Reel 028294/0412

  • Conveyance: Assignment
  • Assignor: WATKINS, OLIVER (LAKE), JR.; CHOWDHARY, YOUSUF; BRUNET, JEFFREY; SHARMA, RAVINDER (RAY)
  • Assignee: XMG STUDIO, INC.
  • Correspondent: MILLER THOMSON LLP; 20 Queen Street West, Suite 2700, Toronto, Ontario M5H 3S1, Canada. This firm recurs later in this chain.
  • Context: Inventors assigned their rights to the original corporate entity.

• 2013-04-01 (executed) / recorded 2013-04-02 — Reel 030130/0325

  • Conveyance: Assignment
  • Assignor: XMG STUDIO INC.
  • Assignee: 2343127 ONTARIO INC.
  • Correspondent: MARK W. PONG; MILLER THOMSON LLP; 20 Queen Street West, Suite 2700, Toronto, Ontario M5H 3S1, Canada. This correspondent and firm recur in this chain.
  • Context: Transfer from the original operating company to a numbered company, likely for internal asset management or a sale.

• 2018-04-01 (executed) / recorded 2018-04-09 — Reel 045888/0036

  • Conveyance: Merger
  • Assignor: 2343127 ONTARIO INC.; XMG STUDIO INC.
  • Assignee: XMG STUDIO INC.
  • Correspondent: ROBERT S. KREMERS, ESQ.; 7954 Oxford Rd, Rydal, PA 19046. This correspondent recurs later in this chain.
  • Context: Merger and change of name, effectively re-establishing XMG Studio Inc. as the assignee, potentially after its acquisition by Highmark Interactive in 2017.

• 2019-05-21 (executed) / recorded 2019-05-22 — Reel 049249/0617

  • Conveyance: Assignment
  • Assignor: XMG STUDIO INC.
  • Assignee: IMAGINATION PARK TECHNOLOGIES INC.
  • Correspondent: ROBERT S. KREMERS, ESQ.; 7954 Oxford Rd, Rydal, PA 19046. This correspondent recurs in this chain.
  • Context: Transfer from XMG Studio Inc. to Imagination Park Technologies Inc.

• 2019-06-25 (executed) / recorded 2022-08-17 — Reel 061203/0185

  • Conveyance: Assignment
  • Assignor: IMAGINATION PARK TECHNOLOGIES INC.
  • Assignee: IMAGINE AR INC.
  • Correspondent: WAX LAW, LLC; 1000 Friendsville Rd Suite 101, Collegeville, PA 19426. This correspondent recurs later in this chain.
  • Context: Transfer from Imagination Park Technologies Inc. to Imagine AR Inc.

• 2019-06-25 (executed) / recorded 2023-01-24 — Reel 062491/0383

  • Conveyance: Corrective Assignment
  • Assignor: IMAGINE AR INC.
  • Assignee: IMAGINEAR INC.
  • Correspondent: WAX LAW, LLC; 1000 Friendsville Rd Suite 101, Collegeville, PA 19426. This correspondent recurs in this chain.
  • Context: Corrective assignment to update the assignee's name from Imagine AR Inc. to ImagineAR Inc. (as indicated by the current assignee information).

Timeline diagram

timeline
    title Ownership of US 8579710
    2012 : Inventors assign to XMG Studio Inc
    2013 : XMG Studio Inc assigns to 2343127 Ontario Inc
    2018 : 2343127 Ontario Inc merges to XMG Studio Inc
    2019 : XMG Studio Inc assigns to Imagination Park Tech
         : Imagination Park Tech assigns to Imagine AR Inc
    2022 : Imagine AR Inc assignment recorded
    2023 : Corrective assign to ImagineAR Inc recorded
    2024 : CAFC case 26-1720 filed

NPE / troll-pattern signals

1. Shell-entity transfer — Present.

   • 2013-04-01 / 2013-04-02 — Reel 030130/0325: Transfer from XMG Studio Inc. to "2343127 ONTARIO INC.", a numbered company. This typically indicates an entity whose primary purpose is not product development but often holds assets, fitting the description of a shell entity.
   • 2019-05-21 / 2019-05-22 — Reel 049249/0617: Transfer from XMG Studio Inc. to "IMAGINATION PARK TECHNOLOGIES INC.".
   • 2019-06-25 / 2022-08-17 — Reel 061203/0185: Transfer from IMAGINATION PARK TECHNOLOGIES INC. to "IMAGINE AR INC.", followed by a corrective assignment to "IMAGINEAR INC.". ImagineAR Inc. identifies itself as an augmented reality company, but the chain of transfers through various entities after the original game developer was acquired suggests a holding company structure that could facilitate licensing or assertion, rather than direct product embodiment of these specific claims (virtual goods trading in games).

2. Known asserter in the chain — Unclear.

   • None of the assignees (2343127 ONTARIO INC., IMAGINATION PARK TECHNOLOGIES INC., IMAGINE AR INC., IMAGINEAR INC.) are explicitly listed on common public NPE lists (Acacia, Marathon, Intellectual Ventures, etc.) based on available information. However, the litigation at the CAFC (26-1720) suggests an assertion activity.

3. Repeat correspondent across the chain — Present.

   • MILLER THOMSON LLP (including MARK W. PONG) appears as correspondent for the assignments on Reel 028294/0412 and Reel 030130/0325.
   • ROBERT S. KREMERS, ESQ. appears as correspondent for the assignments on Reel 045888/0036 and Reel 049249/0617.
   • WAX LAW, LLC appears as correspondent for the assignments on Reel 061203/0185 and Reel 062491/0383.
   • The recurrence of specific attorneys/firms across multiple transfers within this chain, particularly post-original-assignee, is a strong signal for coordinated patent management, which is common in NPE operations.

4. Cascading transfers — Present.

   • 2019-05-21 / 2019-05-22 — Reel 049249/0617 (XMG Studio Inc. to Imagination Park Technologies Inc.)
   • 2019-06-25 / 2022-08-17 — Reel 061203/0185 (Imagination Park Technologies Inc. to Imagine AR Inc.)
   • These two transfers, while not strictly within 24 months for recording dates due to a delay in recording the second one, show a rapid sequence of executed assignments in May-June 2019, shortly after the 2018 merger event. The effective date of the Imagination Park Technologies Inc. to Imagine AR Inc. assignment is June 25, 2019, just over a month after the previous assignment was executed. This rapid succession of transfers between different corporate entities, particularly with a shift in correspondents, indicates a structured movement of the patent asset.

5. Pre-litigation transfer — Unclear.

   • The CAFC case (26-1720) was filed in 2024. The most recent substantive assignment (Imagination Park Technologies Inc. to Imagine AR Inc.) was executed on 2019-06-25, and recorded on 2022-08-17 and 2023-01-24. This is more than 6 months prior to the 2024 litigation filing, so it's not a direct pre-litigation transfer. However, the patent family has "First worldwide family litigation filed" in 2012, which precedes these assignments (Unified Patents Link: https://portal.unifiedpatents.com/litigation/Delaware%20District%20Court/case/1%3A24-cv-01252). The provided context doesn't specify when the very first litigation (not just the CAFC appeal) began.

6. Bankruptcy fire-sale — Not present.

   • XMG Studio Inc. was acquired by Highmark Interactive in June 2017, not through a bankruptcy proceeding. The subsequent assignments appear to be strategic transfers rather than a distressed sale.

7. Privateering — Unclear.

   • There is no explicit evidence from the assignment records or the provided patent data (like SEC filings) to suggest a privateering arrangement where an operating company transfers the patent to an NPE to assert on its behalf.

8. Defensive aggregator (anti-NPE) — Not present.

   • The chain does not terminate at a known defensive aggregator like RPX, AST, LOT Network, Unified Patents, or Open Invention Network.

Verdict

NPE — moderate confidence

The presence of multiple shell-entity transfers (from XMG Studio Inc. to a numbered company, and then further transfers to Imagination Park Technologies Inc. and ImagineAR Inc. - Reel 030130/0325, Reel 049249/0617, Reel 061203/0185, Reel 062491/0383) and the repeated use of specific correspondent attorneys across different stages of the chain are strong indicators. Additionally, the rapid succession of executed assignments in 2019 (Reel 049249/0617, Reel 061203/0185) points to a structured handling of the patent asset. The patent is currently involved in litigation at the CAFC (case 26-1720), further supporting an assertion-focused strategy.

USPTO Assignment Center search: https://assignmentcenter.uspto.gov/

Here is an analysis of the most relevant prior art for US Patent 8579710, based on the citations listed within the patent itself and a search of the USPTO database (accessed via Google Patents). The priority date for US8579710 is January 20, 2011.

The primary innovation of US8579710, as articulated in its independent claims (Claims 1 and 15), centers on a system and method for trading virtual goods where:

1. Player ratings are used to automatically and dynamically increase or decrease the value of a virtual good.
2. The virtual good is then made available for purchase at this new, adjusted value.
3. Crucially, before allowing a purchase, the system checks whether the requesting player previously rated the virtual good (to prevent fraud/collusion).

While some of the cited prior art touches upon aspects of virtual goods, dynamic pricing, or user ratings, none appear to fully anticipate the specific combination of these features, particularly the dynamic value adjustment based on player ratings for trading combined with the anti-collusion check.

Here are the cited prior art documents:

1. US6009458A

• Full Citation: US6009458A - Networked computer game system with persistent playing objects.
• Publication Date: December 28, 1999.
• Filing Date: May 9, 1996.
• Brief Description: This patent describes a networked computer game system that manages virtual "playing objects" which can persist across different game sessions and even be used in multiple games. It focuses on the technical aspects of managing and reusing these persistent virtual objects within a networked environment.
• Potential Anticipation: This patent broadly relates to virtual objects within a game system (element of claims 1 and 15 related to "virtual good" in a "game environment"). However, it does not describe mechanisms for players to rate these virtual goods, nor for those ratings to dynamically adjust the good's value for trade, nor the anti-fraud checking of a requesting player's prior rating history. Therefore, it does not anticipate the core inventive features of US8579710's claims 1 or 15 under 35 U.S.C. § 102.

2. US20080059384A1

• Full Citation: US20080059384A1 - Digital online exchange for pricing items to exhaust inventory by an expiration time.
• Publication Date: March 6, 2008.
• Filing Date: February 28, 2001.
• Brief Description: This patent discloses a method and system for dynamically pricing items in an online exchange. The pricing model is designed to manage inventory and ensure items are sold by a certain expiration time, potentially by automatically decreasing prices over time or based on inventory levels.
• Potential Anticipation: This patent relates to dynamic pricing in an online context (relevant to "increasing or decreasing...the starting value" in claims 1 and 15). However, its pricing mechanism is driven by inventory and time-based goals, not by user ratings of the items themselves. It does not teach the specific interaction of player ratings affecting virtual good value for trading within a game, nor the anti-fraud check. Thus, it does not anticipate the key elements of claims 1 or 15 under 35 U.S.C. § 102.

3. US20080154798A1

• Full Citation: US20080154798A1 - Dynamic Pricing Models for Digital Content.
• Publication Date: June 26, 2008.
• Filing Date: December 22, 2006.
• Brief Description: This patent describes systems and methods for dynamically pricing digital content based on various factors, including demand, popularity, user profiles, or other market conditions. It mentions "popularity" as a potential factor influencing price.
• Potential Anticipation: This patent discusses dynamic pricing and the use of factors like "popularity" (which could be indirectly derived from ratings), aligning with the general concept of value adjustment in claims 1 and 15. However, it does not explicitly detail a system where explicit player ratings of a virtual good directly and automatically increase or decrease its value for trade within a game environment. Furthermore, it lacks the specific anti-fraud check based on the requesting player's rating history. Therefore, it does not fully anticipate claims 1 or 15 under 35 U.S.C. § 102.

4. US20090265636A1

• Full Citation: US20090265636A1 - System and Method for Selling Preference-Based Virtual Objects.
• Publication Date: October 22, 2009.
• Filing Date: April 22, 2008.
• Brief Description: This patent describes a system and method for selling virtual objects based on user preferences. It involves receiving user preferences for virtual objects and then providing those objects for sale, possibly tailoring recommendations or offerings based on these preferences.
• Potential Anticipation: This patent involves virtual objects and user preferences (related to "rating" and "virtual good" elements in claims 1 and 15). However, it focuses on using preferences for sales or recommendations, not for dynamically adjusting the inherent value of the virtual good itself for general trading based on received ratings. It also lacks the specific anti-fraud checks. Thus, it does not anticipate claims 1 or 15 under 35 U.S.C. § 102.

5. US20100042577A1

• Full Citation: US20100042577A1 - Systems and methods for calibrating user ratings.
• Publication Date: February 18, 2010.
• Filing Date: August 12, 2008.
• Brief Description: This patent describes systems and methods for improving the accuracy and trustworthiness of user ratings by calibrating them, for instance, by detecting fraudulent ratings or weighting ratings based on user behavior.
• Potential Anticipation: This patent directly addresses "user ratings" (relevant to "receiving...at least one rating" in claims 1 and 15) and methods to ensure their integrity, which is an underlying concern also present in US8579710's anti-fraud check. However, this patent focuses on the calibration of ratings and does not describe using these ratings to dynamically adjust the trading value of virtual goods within a game environment, nor the specific pre-sale check. Therefore, it does not anticipate claims 1 or 15 under 35 U.S.C. § 102.

6. US20100114739A1

• Full Citation: US20100114739A1 - Systems and methods for a comprehensive integrated and universal content selling and buying platform.
• Publication Date: May 6, 2010.
• Filing Date: September 3, 2008.
• Brief Description: This patent describes a broad platform for facilitating the buying and selling of digital content, aiming for integration across various content types and a universal marketplace.
• Potential Anticipation: This patent broadly covers buying and selling digital content (relevant to "trading virtual goods" in claims 1 and 15). However, it lacks any specific teaching of dynamically adjusting the value of virtual goods based on player ratings within a game, or the anti-fraud mechanism of checking a requesting player's previous ratings before a sale. Therefore, it does not anticipate claims 1 or 15 under 35 U.S.C. § 102.

7. US20100175002A1

• Full Citation: US20100175002A1 - Method and system for rating exchangeable gestures via communications in virtual world applications.
• Publication Date: July 8, 2010.
• Filing Date: January 7, 2009.
• Brief Description: This patent describes a method and system where users can rate "exchangeable gestures" (e.g., animations, actions) within virtual world applications. These ratings can be used for various purposes such as displaying popularity or influencing recommendations.
• Potential Anticipation: This patent is the most conceptually similar, dealing with "ratings" within "virtual world applications" (elements in claims 1 and 15). However, it specifically focuses on rating "gestures" rather than virtual goods that have a tradable value, and critically, it does not explicitly teach the dynamic adjustment of the market value for trading based on these ratings. Most significantly, it does not include the pre-sale anti-fraud check of a requesting player's prior rating history, which is a distinguishing feature of US8579710. Therefore, it does not fully anticipate claims 1 or 15 under 35 U.S.C. § 102.

8. US20110302052A1

• Full Citation: US20110302052A1 - Protecting Game Related Content In A Centralized Marketplace.
• Publication Date: December 8, 2011.
• Filing Date: June 8, 2010.
• Brief Description: This patent describes systems and methods aimed at protecting game-related content within a centralized marketplace, including ensuring proper licensing and preventing unauthorized distribution or use.
• Potential Anticipation: This patent concerns the security and management of game content in a marketplace (relevant to the "game environment" and "trading" aspects of claims 1 and 15). However, it does not involve player ratings as a mechanism for dynamic value adjustment of virtual goods, nor the specific anti-fraud check based on rating history prior to sale. Therefore, it does not anticipate claims 1 or 15 under 35 U.S.C. § 102.

Obviousness Analysis of US Patent 8579710 Under 35 U.S.C. § 103

This analysis examines the obviousness of US Patent 8579710, focusing on independent claims 1 (method) and 15 (system), by considering combinations of prior art references that a person having ordinary skill in the art (POSITA) would have been motivated to combine as of the patent's priority date (January 20, 2011).

The core elements of US8579710 include:

1. Providing a game environment where a first player can acquire or develop a virtual good with a starting value.
2. Receiving at least one rating for the virtual good from a second player.
3. Automatically adjusting (increasing or decreasing) the virtual good's value based on these ratings to a new value.
4. Making the virtual good available for purchase at this new value.
5. Crucially, when a requesting player seeks to purchase the virtual good, checking whether that player previously rated the virtual good before allowing the sale.

The general concepts of virtual goods trading in a game environment, assigning initial values, and making goods available for purchase are widely known and acknowledged in the background of US8579710 itself, as well as by references like US6009458A ("Networked computer game system with persistent playing objects"). Therefore, the analysis will focus on the more specific combination of dynamic pricing based on ratings and the anti-fraud checking mechanism.

Combination of Prior Art for Dynamic Pricing Based on Player Ratings

A POSITA would have been motivated to combine existing technologies to create a system where virtual good values are dynamically adjusted by player ratings.

1. Dynamic Pricing Models for Digital Content: US20080154798A1 ("Dynamic Pricing Models for Digital Content") discloses methods and systems for dynamically adjusting the price of digital content to achieve revenue goals. While not explicitly limited to "player ratings," it provides the fundamental concept and motivation for dynamically pricing digital assets. A POSITA would understand that user feedback, including ratings, is a common and effective input for dynamic pricing algorithms in e-commerce and digital marketplaces.
2. Rating Virtual Objects in Virtual Worlds: US20100175002A1 ("Method and system for rating exchangeable gestures via communications in virtual world applications") explicitly teaches a method and system for receiving and processing ratings for "exchangeable gestures" within a virtual world application. These "exchangeable gestures" can be understood as a type of virtual good. This reference establishes the concept of players providing ratings for virtual items in a game environment. Additionally, US20100042577A1 ("Systems and methods for calibrating user ratings") demonstrates the known art of managing and understanding the credibility of user ratings.

Motivation to Combine: A POSITA in game development, recognizing the potential to enhance engagement and create more dynamic in-game economies, would be motivated to integrate player feedback into pricing mechanisms. By combining the dynamic pricing models for digital content (US20080154798A1) with the ability to receive and process player ratings for virtual items in a virtual world (US20100175002A1), it would be obvious to develop a system that automatically adjusts the value of virtual goods based on these player ratings. This would allow the price to reflect perceived value, desirability, or effectiveness, thereby creating a more responsive and immersive trading experience within the game environment. The background of US8579710 itself highlights the desire to overcome prior art limitations where "the seller assigns a value to a virtual good" and "lack the ability to take other factors into account for ascribing value to virtual goods," thereby explicitly articulating the motivation for such a dynamic, rating-driven system.

Combination of Prior Art for the Anti-Fraud Check

The specific feature of "checking whether the requesting player previously rated the virtual good prior to allowing a sale" (Claims 1 and 15) also appears obvious in light of the aforementioned combination and general knowledge in online commerce.

1. Problem Recognition: Once a system is established where user ratings directly influence the economic value of items, a clear motivation arises to prevent manipulation or fraud. Players could otherwise negatively rate an item to lower its price and buy it cheaply, or positively rate it to inflate its value for a potential sale (if the system allowed self-selling based on self-ratings, which the patent also contemplates preventing). The patent explicitly recognizes this problem: "In order to mitigate the possibility of players banding together to rate a virtual good negatively to lower its value, so that they can purchase it after its value has gone down..." and describes safeguards like preventing a negative rater from buying at the lowered price or a positive rater from selling at the higher price.
2. Known Rating Integrity Concerns: The existence of US20100042577A1, which details "Systems and methods for calibrating user ratings" and discusses "calibrating the credibility of a user in providing ratings," demonstrates that the problem of rating integrity and preventing abuse was well-known in the prior art.
3. Obvious Anti-Fraud Mechanism: Given the known issues with user-generated content influencing value in online systems (as evidenced by US20100042577A1) and the clear motivation to prevent economic manipulation in a rating-driven virtual economy, a POSITA would find it obvious to implement a safeguard that restricts a player from directly benefiting from their own rating actions. Checking a player's rating history for a specific virtual good before allowing them to purchase it at a new, potentially manipulated price is a straightforward and logical anti-fraud measure. It is a common design principle in online marketplaces to prevent users from influencing prices or reviews for personal gain.

Conclusion:
Claims 1 and 15 of US8579710, encompassing a method and system for dynamically adjusting the value of virtual goods based on player ratings and including a check for prior player ratings before purchase, would be rendered obvious by combining US20080154798A1 and US20100175002A1, along with general knowledge in online systems regarding anti-fraud measures and rating integrity (further supported by US20100042577A1). The clear motivation for combining these elements stems from the desire to create more engaging and fair in-game economies that reflect community sentiment while preventing exploitation, a problem explicitly identified and addressed within the specification of US8579710 itself.