Thank you for reply. I used that before, and suddenly the cpm was decreased to 0.3~4. I asked the reason and asked to increase that. But they just said blah blah~~ they couldn't. And So unkind.adsterra all the way. Send them a ticket to increase your CPM and if you have big traffic they will increase to maximum. I curently have 0.60-0.70 cpm on tier 6 country.