Popads is a paying advertising network with tons of traffic for both desktop and mobile, in many GEO locations. It is specialized in pop-unders.
When creating a campaign, under Advertising type you will have options: pop-under, pop-up, tab-under (only works with Chrome browser) and tab-up .
Pop – unders are pop-up ads that open in new window of your browser, usually behind the main window and are visible when user closes or minimizes the main window.
