TJames is right! You must find good traffic in some networks and sent this traffic to some interesting offers from CPA netwotks. Best CPA networks - Mundomedia, Clickdealler. Best sources for buying - Adsterra, Dumedia ( you can registered through manger only, my manager - Alex, his skype alexandr.dumedia) After optimization your campaign you will get good profit! I can make $500-2k per day. But you must find "your best offer" and buy traffic for this offer