Well, after browsing around over there...I have found that yes, they pretty much can do that as its in the TOS.....
Here's a bit of it:
3. License To Use Artist Materials. As and when Artist Materials are uploaded to the deviantART Site(s), Artist grants to deviantART a worldwide, royalty-free, non-exclusive license to do the following things during the Term:
a) to prepare and encode Artist Materials or any part of them for digital or analog transmission, manipulation and exhibition in any format and by any means now known or not yet known or invented;
f) During the Term, deviantART's licenses under this Agreement include the right to use any part of the Artist Materials in the promotion, advertising or marketing of the DeviantART Sites.
Always, always read the TOS of any site you join completely....and frequently. Also note that some sites state in their TOS that certain things can be added to it, with or without your knowledge,{meaning they dont have to announce it} and its up to each user to keep himself/herself aware of all changes.
~Jani
Renderosity Community Admin
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