PopBounty is a pop-under and direct link advertising network. It is global ad network so it pays for worldwide traffic. Publishers from any part of the world can join it and make money by displaying their ads.
They claim to provide highest possible CPM rates for worldwide traffic with 100% fill rates. Like many other Pop-under advertising network they also provide ads for both mainstream and adult websites.
So, whether you own a mainstream website or an adult content website, you can monetize it with PopBounty.