Prime example are MMORPGs. F2P MMOs pretty much destroyed the whole genre. You can see it in other multiplayer live service games too, because ultimately games end up being tailored around micro transactions. So saying "you can get this and that through gameplay too!" is a non-argument, as you just end up having to grind ridiculous amounts for it. They'll make things harder and harder to get, then maybe add some time limitations to invoke FOMO, and eventually it will be micro transaction only and at ridiculous prices too. But by that time everyone already accepted it anyway because people can't think back for any longer than their last TicTok video.