Social credit scores are why I bailed on reddit. Not karma, but their “Contributor quality score” that demands people grind comments to keep the account alive.

I already addressed this regarding Piefed here.

Trolls/spammers etc are serious problems on sites like Lemmy and Piefed (and on Reddit). If you’re a new account and you’ve managed to get -100 reputation that quickly, it’s not a good sign. If and as the Fediverse grows, instance owners are going to need more observation tools to catch this type of stuff.

Whilst having +++ karma is obviously not worth note, a new account on -100 is.