Editing this reply to say that I was in fact right and I did not have any fundamental misunderstanding of anything. And the database in question here is called LAIOn and contains 6 billions images scraped from the web, including CSAM images.

Thanks for that. As I said, I'm not big into how AI works, so not surprised I got that wrong. The databases of everything that has come across the clear web are still there though and are available for use by people with access.