Before the sp I didn't try to spill on tier 1 countries, mostly tier 2 because of lack of budget. And here thanks to good rates and prilas from the very first rk it turned out to be a decent plus. On tests spend minimal money, almost immediately in the CA hit.
If the traffic is high quality, you can earn from $400 - 500 stable. All leads are paid day by day, as there is no hold.

I recommend Sirius if you want to drive traffic with high ROI and comfort.