>>11855
Gacha is more of a chink thing, although Japs do love pachinko for some reason.
The oldest I can think of something like microtransactions was Bethesda DLC for Oblivion, the horse armor being the most egregious bit. I doubt they took much inspiration from it.
If you had shown a gamer in 2006 what kind of things are sold in games today they'd laugh at how absurd it is.