This view doesn't make much sense to me. Epic's game is free. Non loot box, Non pay to win, purely aesthetic optional purchases feels like the least offensive monetization scheme possible. You say you used to be able to unlock the content in game, but that was predicated on your paying money to buy the game already.

Server costs and ongoing dev costs are totally a thing, but I'm not sure why it's so problematic that they make a profit on top of that.