I don't understand when the scam is. He makes crappy books by scrapping public-domain services. Okay, probably low-quality and not much added value, but could be useful. He pushes them up with fake review. Okay, immoral, but a lot of people do it.
TFA says that what he's doing is probably not actually illegal.
But just because something's legal doesn't mean that it's right.
Just read the negative and average reviews before buying and you should avoid it, no ? Am I missing something ?
If you have hundreds of fake positive reviews, the occasional honest negative review will get overlooked. Who reads every review anyway? And who bothers to write negative reviews, come to think of it? If I'd downloaded a book and it was crap, I really wouldn't feel much incentive to waste more of my time writing a review. This applies even more so if the book was free.