Depends on which approach you'd want to go for.
Adsense if you don't run/accept adult images, they pay CPC.
If you do accept adult images, you can use exoclick. They have banners, pops, in-page, etc.
Other adult companies are: Clickadu, ad-maven, adsterra, and many many more.
Honestly it also depends on the traffic, meaning, is it tier-1? tier-2? tier-3? How long do they stay, do the click? etc.