Ad network for alternative stores

Looking for ad network for altenative stores like Amazon.
I know there is Bundle 2.0 airpush but I don’t want to use any bundle product from them. There is SDK in prepare without Google Play Services for amazon store but I am waiting 2 weeks for it;/

Whats about Appnext, Mobilecore? They have CPI ads for Google Play. Amazon users haven’t Google Play Services ;/