There is definitely an element of that from the article and I agree it’s ridiculous. Some authors and their followers attack those who give poor reviews (because they can’t accept criticism, instead arguing that a ‘professional’ review would give them a much better score) and on the other side you have people reviewing books that aren’t even out. In many cases it’s no longer a place to find genuine reviews, but an unmoderated wild west with crap at both extremes (a bit like Twitter in that respect). It’s a shame because there are plenty of people leaving great reviews, but it’s becoming much harder to find them.