From their Rules page:
6. Publicity Release; Use of Personal Information. By accepting a prize, all winners agree and acknowledge that Sponsor and any of its designees, clients, sponsors, or licensees may, without any limitation or further compensation, use his/her name, voice, biographical data, likeness, picture, entry materials, photograph, Work (in whole or in part), city name and audio and/or video recording of him/her in any and all media now known or hereinafter devised, throughout the universe and in perpetuity, for the purpose of advertising and promoting the Contest or for any other promotional purpose, except where prohibited by law. By participating in the Contest, entrants will be sharing their personal information with Sponsor. Personal information collected by Sponsor will be used for administration of the Contest and awarding the prize and as set forth in the Privacy Policy.
7. Grant of Rights. By entering the Contest, entrants irrevocably grant Sponsor, its subsidiaries, divisions, affiliates, designees, clients, sponsors, licensees, and advertising and promotional agencies, an unlimited, worldwide, perpetual, non-exclusive, royalty-free, unconditional license and absolute right to edit, post, publish, store, copy, transmit, publicly display, and exhibit, the Work (in whole or in part) in connection with the Contest and/or the promotion of the Contest. Upon Sponsor's request, winners agree to sign any and all legal forms deemed necessary to license or assign all right, title and interest in and to the Work, including without limitation, all copyrights associated therewith, in exchange for the Prizes set forth above.
OUCH!!!!
... always sound advice.
