How to make money with Pop-Ups and Pop-under Advertisements

All the internet users are use to pop ups and sometime they are very annoying. However if one is interested to make maximum out of his site, he can try this method of earning money as well. But there is flip side, if you are interested to loyal visitors to your site better avoid using this method, cause there are hundreds of pop-blockers available there and their existence is justified for many reasons.
Here is a list of networks that use pop-ups:
PayPopup
PopupAd
Tribal Fusion
Adversal