My surfers seem to have found a pretty comfortable slot for themselves and don't often venture outside of it, according to my referral stats. So mainstream hasn't been all that remarkable for me. Different sites have different traffic, though, and I'm sure there are a great many folks out there who'd do well with both adult and mainstream. I've spoken to adult site webmasters who make bank on Amazon referrals, so there seems to definitely be a place for mainstream with many adult sites.

And yeah I'll have to echo the comments others have made about goin' after big name pornstar models. Get some cute and yummy friends. New faces will be refreshing to the eyes of surfers and a lot easier for you to get ahold of and work with. Whereas something in my subconscious might make me feel inclined to buy Air Jordans cuz Jordan's name is on em, I'm not quite sure pornstars have that same degree of appeal. I'll buy a porn flick cuz Joe Fuckalot Porn Star is on the cover, but that doesn't necessarily translate to tshirts.