My guess is that it works so well that actual criminal enterprises and foreign adversaries found it a risk - so they send bots to brigade every comment section.
they dont need bots. all normal people know that total usa and big tech domination would turn the world into the worst dictatorship in history. alex karp wants a future where anyone who speaks out against the government gets tracked down and threatened with a drone strike on their home.
if fighting against it means supporting cartels and china then so be it.
criminal enterprises don't waste time on PR, and foreign adversaries would send bots to brigade anything and everything positive about their targets