You can choose ad network by countries, ad formats and stream with our free tool adspyglass.com/best-ad-networks
There is information about minimum payouts, frequency payments and payment systems, and CPMs.
For example, for mainstream, popunder, India, best ad networks:
exo min payout $20, frequency payments - weekly, CPM $0.27
popmyads min payout $5, frequency - on request, CPM $0.20
popcash min payout $10, frequency - on request, CPM $0.13
For banners, India:
Adcash min payout $25, frequency payments - monthly, CPM $0.02
TrafficShop min payout $5, frequency - on request, CPM $0.01
You can check all these data for your countries and choose the best ad networks for your traffic.
Also, note that a new ad format Interstitial has been launched for mainstream and adult sites. CPM is similar to popunder and Google doesn't block sites for this format.
For example CPM rates:
Malaysia Interstitial - $0,49, Popunder - $0,40
India Interstitial - $0,28, Popunder - $0,25
Singapore Interstitial - $1,13, Popunder - $0,44