For sure, but as far as I'm aware, you can't directly buy your way to the top spot. In my experience, the products that earn it have been high quality backed by good customer service.
I used that a while back out of curiosity. I used to write fake reviews in exchange for products (Sorry everyone, I don’t anymore!) because it was a free way to get products related to my hobbies.
Most of the reviews I knew were fake, it said they were fine. I wouldn’t trust it for anything expensive.