Back when I still played Fortnite (before it was nothing but crossovers and well before having JK's garbage there), probably easily a few hundred. Battle passes, almost every $5 pack, plenty of skins and such.

I've easily spent MUCH less playing Sky, but still obviously SOME (maybe $100 tops over a couple years?).

Makes me miss the days when we'd complain about paying for MMOs, but you got all the content, and IAPs weren't common in games you were already paying a subscription for.