As with any commercial exchange, there's a lot of variables other than size of audience, including the composition of the audience, how good the channel is at moving a specific product, whether there are side-opportunities related to the main influencer role, how good of a B2B salesperson one is, etc.
This particular person works as hard as anyone in a startup, around 100 hours a week, and treats it as such. She also happens to be pretty good looking which helps with the videos.
It used to piss me off a little bit, given how hard I have had to work to get to this stage, but one can think of it as very similar to modeling with probably a similar income distribution too (and I seem to intrinsically understand that top tier models make a lot and am ok with it).
My question is -- of all the people making a lot in their 20s and early 30s, how many are going to be making the same amount in their 40s and 50s? I suppose by then their peer generation will also be the same age so it's hard for me to project. I also expect it to be much more of a mature market at that time.