I don't think it's completely the same thing though, this propaganda and trolling could arguably be a positive for Facebook by driving engagement. Of course there's a balance to maintain but it's not necessarily all bad. Socially and ethically it might be bad but bean-counting-wise it might not be that terrible. Facebook doesn't really care if people trust what they see on the platform as long as they generate pageviews and get ad impressions.

On the other hand I don't see how fake reviews and bootleg items do anything but hurt Amazon by making people distrust the platform. You don't want to add friction to the buying process by making people triple check that they're not getting duped.

And it's not like it's a new problem either, lack of trust was a huge issue in the early days of e-commerce, I'm sure Amazon doesn't want to return to these days where you felt like you were swimming in a sea of scams.