Taking the low end of “more than $100K” as being exactly $100K, 3.2M people earning $100K/yr each is $320B/yr and many earn way more than $100K, obviously.
I think either your $50B/yr in the US figure is low (would mean less than 1 in 6 dollars is earned in the US) or, I think more likely, your 3.2M figure is too high.
Where did you source the 3.2M figure?
> many earn way more than $100K, obviously.
Many seems unlikely. Influencer income follows a Pareto distribution so you would expect that most influencers who make more than 100k a year earn close to that.