Quoting from a geek site (slashdot.org) which has the story from the Guardian,
Amazon has created a new rule limiting the number of books that authors can self-publish on its site to three a day
You would imagine this to be directed against plagiarism, but no - it was triggered by suspected AI-generated content.
The number three may change, and:
Authors and publishers will also have the option to seek an exception to the rule.
I wonder how easy it will be to get an exception.
Edit: Added a link to the article.