Many mobile games made by Chinese, especially Net Ease, who also makes Diablo Immortal. Net Ease is notoriously good at sucking money from whales.

They're incredibly popular in east asia in general. It's practically taken over the game markets over there.

I played a game called Kingdom Conquest then Kingdom Conquest 2 that I could see exceeding this. The game reset every few months and you’d have to spend the money all over again. I quit after my “kingdom” and all the other English speaking people got brutally subjugated by our Japanese counterparts. We just didn’t spend nearly as much money as them and totally lost.