In a game called ROBLOX, users can monetize their games through a program called DevEx. Many users who use this program what seems to be obvious copyright infringement issues in their game to a certain degree at least.
I understand that this isn't ROBLOX's liability based on their Terms of Service, but I'm unsure of how to determine user liability.
Users may upload music for a virtual currency fee to the site and often upload a plethora of popular songs, and game developers can use those uploads for free in their own game. If the owner of a copyright files a complaint, does it fall under the responsibility of the user that uploaded it originally or the game creator?