The US Federal Trade Commission has successfully brought the first ever case against using fraudulent, paid Amazon reviews to falsely advertise an online product, the agency announced Tuesday evening. The company in question, named Cure Encapsulations, Inc. and owned by Naftula Jacobowitz, paid a third-party website to write five-star Amazon reviews for a weight-loss supplement called garcinia cambogia. The plant, native to Indonesia, is widely mischaracterized as contributing to weight loss, but is in fact known to cause acute liver failure.

In reality situation is same for all camera related gear also, especially for smaller sellers.
Fake, paid reviews are becoming norm with normal reviews gradually subsiding.
Same thing happened in few last years in movies reviews where it is now bots and paid for people who compete on main platforms.