PopinAds were merged under PayPopUp which is the best of its kind. Paying $7CPM. So now it is not working as pazing company
PopinAds pays you up to $1.00 for every 1,000 RAW PopIn advertisements (equivalent to average $10.00 per 1,000 Unique visitors if every visitor visits 5 pages). Furthermore, when you refer other webmasters to join our program, PopInAds.com will also pay you up to 20% of whatever they earn, and those referrals will run 5 levels deep! So you will get paid on your Referrals Referrals all down the line.