The Slashdot karma system sort of had something like this. It’s been a few years, but comments weren’t given point totals but tags like “insightful”, “funny” fo

The Slashdot karma system sort of had something like this. It’s been a few years, but comments weren’t given point totals but tags like “insightful”, “funny” for positive or “troll” for negative. This way a comment had feedback on why it was ranked higher or lower. A moderator only had so many points to give for a limited period of time as well as other guardrails. In order to get mod status you had to do things like history of reading comments in articles and posting articles and comments which in turn had high marks. This made a positive feedback loop where more positive participation gave more chances for mod status. See: https://slashdot.org/moderation.shtml https://slashdot.org/moderation.shtml On top of that there’s a meta-moderation system where in turn mods in comments are evaluated if they were modded fairly or not. If marked fair the original mod got more karma, and less if deemed unfair. https://slashdot.org/story/99/09/07/155233/slashdots-meta-moderation https://slashdot.org/story/99/09/07/155233/slashdots-meta-mo... I don’t know if such a system can exist in modern day, but out of all comment systems I always found the Slashdot style both simple and fair for the complexities of large comment volumes.