In this world the customer base is a lot smaller. If there is a question about that reviewer being unauthentic, a request to see a label, or tx block is straightforward way to weed out bad actors.

It's a lot harder to get away with fraud in a smaller customer base operation and the people who run the marketplaces are not interested in allowing fraud to persist, they also have an incentive to squash that, unlike amazon.

You’d have to choose to do business with a competitor. And that won’t happen more than once.

Or do business with any newbie on the network, who might be a competitor. Or do business with any customer who gets their account hacked.