I spent over 2k kobans, over 1000 battles, got around 50 of the affinity items, but no drop. That's borderline retarded. What's the point of buying kobans when they are essentially worthless, the only thing that matters is dumb luck....
The only smart thing to do is stop buying kobans, no matter what they offer.
Kill their revenue and they will cancel the game, or improve it. We have this power, let's all use it.
Amen my unregistered brother