Although you can consistently accumulate money for pop-under ads displayed on your websites/blogs, the earnings potential isn't much and you must accumulate 10 bucks in your account in order to cash out. More importantly, the ad experience is terrible in that if your visitors click anything on your site, an interstitial ad that appears from Pop Cash may make it too hard for them to return to your site without closing out all of the extra tabs/windows that pop up.
Launched in early 2012, PopCash is a highly specialized popunder network, with global coverage and a dynamic bidding system, ready to help advertisers get valuable traffic and publishers monetize their space to its full potential.