Comment by daemonologist

I remember talking to some of the folks running UIUC's hackathon (probably ten years ago) and they'd built a sort of page-rank for Github - hand-identifying the most prominent and reputable projects/individuals and then using follows and stars to transfer that reputation. I don't know how well it worked in practice or if it was every published, but it might be more effective than pure star count.

(This was for admissions iirc - they had limited slots and a portion of them were allocated to people with a strong github rank.)