

Might be. It is definitely a thing, though.
When I used to work for a large American corporation that sold products to consumers, they took it extremely seriously and breaking it would result in disciplinary action. It probably had something to do with advertisement laws, but it also easily could have just been because it makes the company look very bad.
one place even asked people to write fake reviews on Trustpilot/job sites
That sounds unethical, to say the least. Did they verify if you actually did it, or just “suggest” you do?
One instance? There’s at least two. But does that really matter? Reddit had r/TheDonald and r/conservative, and trying to get those people to fuck off and stop proselytizing elsewhere was like trying to play whack-a-mole against an anthill.
Here, you block the tankie instances and move on with your life.