I found that such a generalization that network A or network B is better is NOT true.
Each and I mean, even the worst network has some offers that will increase your earnings if you just show certain offers for specific countries as first.
And it works for every amount of traffic.
I mix offers from 2 - 3 networks any my earnings are about 200% higher.
Which is hilarious that I only did that and that's how much it can boost.
Plus if you talk to AMs and give them valid reasons, they'll add you some extra offers.
Think on country / offer / traffic behavior level instead of just network wide level.