By uploading, submitting or otherwise disclosing or distributing Content of any kind on the TheFind website or otherwise through the Merchant Services, you: 1) grant to TheFind, its affiliates and their assignees the perpetual, irrevocable, non-exclusive, royalty-free right to use, reproduce, display, perform, adapt, modify, distribute, make derivative works of and otherwise exploit the Content (including without limitation, any concepts, ideas or know-how embodied therein) as determined by TheFind in its sole discretion; 2) represent and warrant to TheFind that you own or otherwise control all rights to the Content and that disclosure and use of such Content by TheFind (including without limitation, publishing Content at any website controlled or operated by TheFind) will not infringe or violate the rights of any third party; and 3) acknowledge that the Content may not be treated confidentially. (merchant.thefind.com/mc/claim.fhtml, 4/4/2012 10:40am)
These are their terms - they explain that you own the content, but they can use that content in any way they (or any affiliates they have) want. Your agreement to let them do so is by signing up as a merchant.