Are you aware of the site Pinterest (http://pinterest.com)? Where you can pin images and people can look at/comment on them? It’s a social network surrounding images. I thought it was interesting so went to have a look at creating an account but decided to read the terms first. In the terms I found a rather interesting paragraph that seems to say that you are granting Pinterest a license to do whatever they want with your content if you upload to the site:
We may, in our sole discretion, permit Members to post, upload, publish, submit or transmit Member Content. By making available any Member Content through the Site, Application or Services, you hereby grant to Cold Brew Labs a worldwide, irrevocable, perpetual, non-exclusive, transferable, royalty-free license, with the right to sublicense, to use, copy, adapt, modify, distribute, license, sell, transfer, publicly display, publicly perform, transmit, stream, broadcast, access, view, and otherwise exploit such Member Content only on, through or by means of the Site, Application or Services. Cold Brew Labs does not claim any ownership rights in any such Member Content and nothing in these Terms will be deemed to restrict any rights that you may have to use and exploit any such Member Content.
It is therefore my suggestion that if you were thinking of using it to increase exposure to your business/brand that you refrain from doing so. This could potentially be handing them a license to create their own products utilising your business/brand. But obviously this would be your decision either way.
Here’s an interesting blog post that highlighted this issue: http://directmatchmedia.com/pinterest-copyright.php