> By posting your Contributions to any part of the Site or making Contributions accessible to the Site by linking your account from the Site to any of your social networking accounts, you automatically grant, and you represent and warrant that you have the right to grant, to us an unrestricted, unlimited, irrevocable, perpetual, non-exclusive, transferable, royalty-free, fully-paid, worldwide right, and license to host, use, copy, reproduce, disclose, sell, resell, publish, broadcast, retitle, archive, store, cache, publicly perform, publicly display, reformat, translate, transmit, excerpt (in whole or in part), and distribute such Contributions (including, without limitation, your image and voice) for any purpose, commercial, advertising, or otherwise, and to prepare derivative works of, or incorporate into other works, such Contributions, and grant and authorize sublicenses of the foregoing.

It sounds an awful lot like "we are allowed to do anything and everything we want with the content you upload to us". Maybe I'm misunderstanding something, but I'd be extremely hesitant to upload any content I create to a service with those kinds of terms.