After testing a lot of Cost Per Action networks out there but it seemed to me that only three of them managed to convert well for adult traffic. Here is the short list:

• Slim Spots – Converts 257 countries for both desktop and mobile. Support is friendly and reliable. They have amazing promo tools including the backoffer tool, where if a visitor wants to go back to the previous site they were in, if not interested in your site, they are being redirected to an offer instead. How cool is that!? Totally recommended.
• Traffic Company – I recommend this network for mobile traffic, no matter adult or mainstream. Almost every visit turns into conversion. A must for every adult webmaster with mobile version of their website.

Signup and start promoting! Good luck!