PopUpTraffic is here very long time. It looks like there is new company managing this advertising company and I got finaly reply to my email so it looks like they are going to work with every quality traffic. You get $4.00 CPM for popups, $3 CPM for PopBehind and $4 CPM for ExitPopups. PopupTraffic accept webmasters only from some countries so first check via email support if your account will be approved before you send some traffic. Payments are made what I know by paypal, check and wire when you reach minimum $25.