Adxmi has developed various competitive products for both publishers and developers.
We have partnership with more than 10000 advertisers and 190000 developers. Our ads spread more than 230 countries and areas and the form have offerwall, interstitial, customized ads, etc.
You just need to embed the SDK(about 200K) to your app, or link to your app with our API. ECPM $5~22. There has been a lot of developers have cooperated with us, such as Cheetahs, Kika, 360, etc.