others that siphon off usa traffic, red returns (Red Flush, La Vida), brightshare ((all slots, all jackpots). never made a cent with brightshare in two years of sending them usa traffic. nor Red Returns that I know of.
with red returns apparently there is a “special list” (oh yeah) to get credit despite asking openly over at AGD many, many, many moons ago (if we get credit for those referrals).
so it is best to redirect your usa traffic to usa facing brands.