I don't know why this argument is being brought up again, because yeah, FKG IS a stamp/waifu collection game.

It's not just FKG either. Take any other gacha game, throw in a guaranteed/pick option, or even increased odds, and people WILL bite.

I get more confused with people who whale on FKG for statwhoring reasons.

These frequent sales also more or less remove the need to buy FGs, so you're basically getting more guarantees out of your spending.