From the figure in the title, she spends under 2 days per book. That's from the start of her "career", so I assume the rate has been ramping up. This isn't enough time to read and review a book, let alone write one, so it would indeed be delusional to call her an author.

She figured out a way to make a quick buck off gullible and uncaring people, and a market that has not been thoroughly saturated with slop yet. There's not much more to it.