Literally this!
I think I bought a couple of cars in Rocket League but I don't think I've spent more than £25 on the whole game and dlc. It's my number 1 most played game on Steam so IMO I'm getting some seriously good value for money.
So long as the costumes in PUBG aren't ridiculously priced then I don't have a problem. If people buying these cosmetic items are helping to fund further free expansions to the game then I'm okay with it.
They've said future expansions etc will be free?