

That’s really difficult to do with a karma-like system. People posting in echo-chambers can post misinformation but receive many up votes.
Credibility is subjective. For example, people on one side of a political ideology will not think people on the opposite side are credible. So who can really determine an “attribute of credibility”?
We would have to agree on a standard first and that’s just not going to happen.
The only thing they could bring back that would make me consider making an account is TheButton. By the way I was a 42s Blue Hitchhiker.