Just found this videos on how to make money using popup ads. I really find this videos helpful and full of ideas. You should check these out.
Here’s my favorite method:
Doing some Math on how much you’ll make through Pop-up ads.
So if you’re site gets a lot of pageviews (Like Proxy sites) you might want to use these kind of monetization technique. Just imagine $27 for 9k impressions! That’s big!
UPDATE! Yes, pop-up ads are kinda rude, but if you have non-returning visitors (i.e. Visits from General websites, MySpace Profiles, Typo domains, etc..) You’d make a great sum of money out of this!