If the company is worthless, has no integrity, or is an idiot, no. Blacklisting an independent reviewer for a negative review says to me a company relies on dishonest shills rather than their own quality. "You didn't like that one? Here, try this one." at least takes some integrity.

Let's use the example of power tools. A reviewer is sent a tool, doesn't like it. Switch isn't very good, too heavy, motor breaks. So he produces a bad review, recommends against it. A shit company tries to prevent this guy from talking about them again. A good company says "Hey, will you try our new and improved version?" A company that takes their Ls and even listens and responds to criticism is worth paying for.

I more meant if you require companies to send you goods to review for your business to work, then you can't be impartial.