Yep, you're talking about the games I had in mind when I said some games are beginning to lay the groundwork. Notably, Bee Swarm Simulator was made by a grown-ass man who had (IIRC) mobile dev experience before going to Roblox. And within that genre of games he's been copied more recently by pretty exploitative stuff like Pet Simulator X. But that "simulator" / pet collection genre is one of the only spots on Roblox where you can find that kind of open-ended monetization and if you could see their internal stats, you'd see that they're mainly monetizing through quantity of players like everyone else.

It is worrying to think that kids might end up dropping thousands of dollars on a game, but I think if that does start happening, you're going to see it in the news instantly. Like I said, it is really idiotic of Roblox to even begin venturing down that path; they should be clamping down on that kind of monetization to stop it from growing, but so far they have not done anything except enforce basic loot box legal standards (must show odds).