Steam has the same thing in their EULA:
""User Generated Content" means any content you make available to other users through your use of multi-user features of Steam, or to Valve or its affiliates through your use of the Content and Services or otherwise.
You grant Valve and its affiliates the worldwide, non-exclusive, right to use, reproduce, modify, create derivative works from, distribute, transmit, transcode, translate, broadcast, and otherwise communicate, and publicly display and publicly perform, your User Generated Content, and derivative works of your User Generated Content, in connection with the operation and promotion of the Steam site. This license is granted to Valve for the entire duration of the intellectual property rights and may be terminated if Valve is in breach of the license and has not cured such breach within fourteen (14) days from receiving notice from you sent to the attention of the Valve Legal Department at the applicable Valve address noted on this Privacy Policy page. The termination of said license does not affect the rights of any sub-licensees pursuant to any sub-license granted by Valve prior to termination of the license. Valve is the sole owner of the derivative works created by Valve from your Content, and is therefore entitled to grant licenses on these derivative works. If you use Valve cloud storage, you grant us a license to store your information as part of that service. Valve may place limits on the amount of storage you may use."
So does this forum:
"C. By registering an account at NeoGAF.com and participating (including but not limited to submitting posts or private messages on NeoGAF.com), you hereby grant NeoGAF LLC and our licensees, distributors, agents, representatives and other authorized users, a perpetual, non-exclusive, irrevocable, fully-paid, royalty-free, sub-licensable and transferable (in whole or part) worldwide license under all copyrights, trademarks, patents, trade secrets, privacy and publicity rights and other intellectual property rights you own or control to use, reproduce, transmit, display, exhibit, distribute, index, comment on, modify, create derivative works based upon, perform and otherwise exploit the messages posted or private messages sent on NeoGAF.com, in whole or in part, in all media formats and channels now known or hereafter devised, for any and all purposes including entertainment, news, advertising, promotional, marketing, publicity, trade or commercial purposes, all without further notice to you, with or without attribution, and without the requirement of any permission from or payment to you or to any other person or entity."