Figures tell everything right? I started using Popads and Bitcoadz almost the same day. As everyone knows, Popads only provide Popunder but Bitcoadz provide banners too. I put both of my website with Popads and Bitcoadz with popunder. Other than that, I also put another 2 Bitcoadz banner on each website. Guess what, my Popads earning are 4 times more than Bitcoadz which is only Popunder without any banner. I think these figures explain everything.