There is some kind of web of trust. Interactions with more trusted users increase it and upvoted comments/posts are good.
I don't think we have deeper insight into it AFAIK.
Tbh, I am not very good in actually understanding code from open source projects. It seems to iterate through a graph beginning with @k00b - that makes sense
But the creation of the graph via sql is black magic to me: discounted by time logarithmic, then just building the sum means no penalty for lots of low-upvote comments (?)
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