Consider the symbiotic relationship between manufacturers and reviewers.
The manufacturer sends the product to the magazine/reviewer on extended loan for months if not years. Sometimes they never get it back. Sometimes they lend more stuff. And the reviewer can always finally buy it at the "accommodation" price.
Consider what happens if the reviewer gives a bad review. The manufacturer will no longer loan him any more product, and may even look twice at that whole magazine. Other manufacturers see that that reviewer gave a bad review, and also steer clear of him.
Magazines claim that there are no bad reviews in them any more because there's no much product, that they just avoid reviewing inferior items. But obviously there's another reason.