I'm looking for best-paying pop-under (or any other ad type, whatever pays the most) on CPM/PPV or whatever you call it, bases. I'm currently running Clicksor, but it doesn't work very well, I don't want to get into details. Mostly I get traffic from Latvia, US, UK and India (In that order) so basically I need ad network with ads for every country. How much CPM can I expect from this traffic? Which ad network do you recommend?