The low-effort AI-generated botshit has presumably reached such a volume in the books world that Amazon has decided to impose a limit such that authors may only publish 3 books per day (!) onto its site. Maybe they didn’t enjoy that point in time that pure nonsense started topping their Kindle book charts.
Any humans that can in fact author four high quality books a day might suffer. Luckily they probably also don’t exist.
Smaller companies are obviously suffering more. Last year, the famous Clarkesworld sci fi magazine had to stop accepting submissions for publication because they couldn’t handle the volume of AI generated guff. Their competitors, Asimov’s Science Fiction and The Magazine of Fantasy & Science Fictions are seeing similar behaviour.