[Mister X]

Well that's pretty much a hole-in-one I'd say. I'm not sure about matching the sponsor's layout/colours yet cuz I've just started trying that. The rest though is absolutely true. Matching the content is definitely the most important. If they think a chick is hot enough to click through to the sponsor's site then you want to be sure that that girl is indeed visible somewhere on the sponsor's site. There are some exceptions amongst the mega sites perhaps where they have a very high update rate and not every girl is going to be visible on the tour. But those sites are generally over-exposed anyway. And the BIG thing is to make sure that the content is in same niche as the site. I've seen a lot of galleries with some titanic titted pornstar being used to sell barely legal. It just doesn't work.