Hey guys! Dont want to waste your time!! Here is the one very important thing!! Tier 1/2/3 - a lot of networks love to use those definition.. Do you really believe in it?! In my opinion it it showing nothing. For example Tier 1 used to be valued as fattest traffic. WHY? According ranking Czech Republic and Hungary is Tier2. For me and my friends it is showing even better result than Australia which is over pitched always!! You can send smaller volume on a Tier2/3 not f@ucked up country and get better results!! Did you have some times good experience with not profitable GEO which brought you a lot???