sponsor content is for promoting a particular site/program. if you use it for any other purpose, you're probably violating the terms. if you use them inside a paysite where guaranteed credit card users are, and you use the content in galleries with links to the sponsor site and no links to other sponsor sites, seems fair to me.

on a gallery, if all the content is from one program, there should be no links to other programs. same with a free or avs site if all the content is from one sponsor. to me, one sponsor provides the content - then only that sponsor should be advertised. not only is that fair, but i've seen it on terms and conditions for use of content.