I was hit up by Google several months ago and was told I needed to remove their ads for a page of content I have on my site because the material was deemed by them to be adult and in violation of their TOS, even though the photos were at a free public event with children and what not. Anyhow, I obliged but am looking for other reliable (as in pays up) and consistent (pay well) PPC advertisers that won't be upset with any marginal content.
Adbrite and blacklabelads.com accept adult ads. The problem is that the advertiser make sites just to sell ads, and most of the traffik is not from surfers willing to go to the site but rather forced to do so by sitowners traffik trading script.
I used commission junction for a long time and it rang up loads of impressions and no $. I figured they were a scam. I can't remember the numbers fully but they were silly...