Part of it's also the fact she has a LOT of books out there, the more material you have the higher chance someone discovers you and if you write well enough, th

Part of it's also the fact she has a LOT of books out there, the more material you have the higher chance someone discovers you and if you write well enough, they'll love your stories and start buying them all up. THAT is how an author makes a living at it without being a lottery, create enough content that fans can keep buying while picking up a few new readers here and there.