By submitting, posting or displaying Content on or through SourceForge.net, you grant COMPANY a worldwide, non-exclusive, irrevocable, perpetual, fully sublicensable, royalty-free license to use, reproduce, adapt, modify, translate, create derivative works from, publish, perform, display, rent, resell and distribute such Content (in whole or part) on SourceForge.net and incorporate Content in other works, in any form, media, or technology developed by COMPANY, though COMPANY is not required to incorporate Feedback into any COMPANY products or services.
I could be wrong, but from what I can understand, it seems that for everything published on sourceforge, the COMPANY wants to retain the right of violating the basic GPL principle of sharing alike.
In other words, if I have correctly read the TOS, the following scenario could be true: Someone distributes a GPL open source system through SourceForge.net, the COMPANY, invoking the above paragraph of the TOS, can create a derivative closed source system and sell it bypassing the GPL.
I sincerely think that I have misunderstood the TOS, but I would like to have a clear simple answer that, if I distribute my GPL protected software through SourceForge.net, the COMPANY cannot create derivative works from my sources and redistribute/sell it as closed source.
Thanks in advance