If you read through the angry Twitter thread it's clear that almost everyone thinks that either a) the site is a pirate site that lets you download books or b)

If you read through the angry Twitter thread it's clear that almost everyone thinks that either a) the site is a pirate site that lets you download books or b) that the site lets you generate works in the style of an author. Neither of which is true of course. There are a handful (like < 3 people) who seem to understand what the site actually does who were still angry because the creator seems to have pirated the books. I actually don't know about the legality of something like that. Surely providing pirated books is illegal, but IDK if acquiring pirated books actually is. I think it's clear though that most of the outrage would still be there even if the author had purchased each and every book.