Can't speak for her but I personally don't write fanfic, and I doubt yours is making you much money, if any, in this insanely over-saturated market. I don't know why you're shilling so hard for this business model and this particular woman. Are you on her marketing team or something? Advertising working for a fast food chain would be more genuine and actually profitable.
You'd have better odds trying to make a new top MOBA.
Unfortunately, intelligence is still a gamble in financial success. A surprising amount of the biggest winners are brainlets that got extremely lucky, then fade into obscurity and usually debt from spending their riches in silly ways, for the rest of their lives.