Not sure if you’re joking but is it possible to even do that? I understand some books are kept on their cloud servers and only some get downloaded.

The first time I got an ad on mine I did that and switched to the Calibre + z-library workflow. It's been most of a decade since.

It's like people have to be taught the same lesson about SAAS over and over and over again. Like what did they expect, to not get rug pulled eventually? Crazy. You own your shit or you don't. Simple as.