Where to buy visitors for adult content

Let's say that I can convert 1000 people to $15 – $20 in adult niche. I want to buy traffic from banners I checked juicy ads but they are to expensive minimal 0.02 CPC for Tier 1 which is $20 for 1000 people. Also I checked plug rush, there I can get 1000 people for $5 but it's seems to ideal probably there is some catch.

Do you guys have any advice?