Just looking over Benson Leung's reviews list, some of these items are transparently fishy. For instance, this Benson review has nearly 50% "unhelpful", while the product page is fully of sketchy positive reviews. It's a USB cable, who takes photos and writes essays about them? Tried it in FakeSpot, and it figures the product has "68% low quality reviews".
Fake positive reviews and "unhelpful" spamming on negative reviews. Does Amazon have any mechanism to deal with this type of gaming?