Consumer Reports buys the products they review. They can't be blacklisted if they're not relying on the manufacturer to send them a free demo/item.

(Youtube/Blog) Reviewers get blacklisted by companies by not providing a positive review about a product they were given. As they rely on scooping type style reviews, this means they not only don't get a free product to review, but they can't review it until after it's for sale instead of being able to 'preview' it for people and get more clicks that way.