I was answering your first sentence.

Do some accounts upvote the same posts at the same time beyond a safe %. Are some accounts posting identical posts. Does a post include a link to a known scam site.

Flag for review (not suspension) if an account keep posting links with the same text. This can detect unknown scam sites, or referral links. You're not looking for someone who posts multiple links to the same news site, but if they exclusively post links from that site it could mean they're related to it.

Accounts with AI or people behind them are much harder to detect.

I was answering your first sentence.

Do some accounts always upvote the same posts at the same time. Are some accounts posting identical posts. Does a post include a link to a known scam site.

Flag for review (not suspension) if an account keep posting links with the same text. This can detect unknown scam sites, or referral links. You're not looking for someone who posts multiple links to the same news site, but if they exclusively post links from that site it could mean they're related to it.

Accounts with AI or people behind them are much harder to detect.