Sponsors (Affiliate Programs) provide content known as Free Hosted Galleries (FHGs) for you to link to from your site. Commissions are Pay-per-sale (usually $40 one time) or Revenue Share (recurring percentage of sales, usually 50%)
If you're looking for a WordPress tool to import the FHGs, check out
AdultGalleryPress - Theme + Plugin. There are over 1,000,000 galleries available from various
sponsors.