Six Moons charges for reviews?

I recently heard from an audio manufacturer that Srajan from 6 Moons requested payment to publish the company's review that was in-progress. I have used 6 Moons for many years believing them to be unbiased. It would be disappointing if this practice was widespread. Anyone know if this is "normal" business for reviewers? Have I just been naive? It would not be the first time.