I would go for IMEI that's seem the most reasonable.
They have the NET30 pay also to make sure the installs are not dummy ones, so that if advertisers are not happy about the customers they send, you don't get paid. I felt like I needed to tell you that.
what is NET30?
Hahahh yeah,it sounds like OP wants to find a way to send some fake installs.I would go for IMEI that's seem the most reasonable.
They have the NET30 pay also to make sure the installs are not dummy ones, so that if advertisers are not happy about the customers they send, you don't get paid. I felt like I needed to tell you that.