In case you think I'm nuts view the submission policy you have agreed to here: http://about.deviantart.com/policy/submission/
Mainly:
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;
b) to display, copy, reproduce, exhibit, publicly perform, broadcast, rebroadca