Or just stop playing games that exist as shitty GACHA vending machines.
It isn't even the cost per-say. Its the fact that mounts were implemented in D4 as a practical afterthought. They barely affect gameplay, you can't take them into dungeons, they don't have any kind of skill progression or character synergy on their own right. Barely more than a TF2 fancy hat.
I got D4 at base price on release, played the main act, and shelved it months ago. I can't imagine still playing a game that's been nothing but bloody runs since that initial release. Nevermind paying $60 for a fucking cosmetics improvement while I grind mobs for incremental stat increases at the level cap.
TF2 fancy hats are relevant to the game. They provide an entire economy and allow for style, when finding ever new or enjoying old ways of hilarious frags.
They are not an after thought, but a solid part of the games progressed development. However they are not providing an advantage in the core play, so everyone can still enjoy the game.
I mean Diablo is pretty addicting too lol, one of my friends dropped out of school for Diablo. Then again, one of my friends almost dropped out of school for Modern Warfare 2 - not that it wasn't fun of course (most fun CoD imo).