There are clearly inflection points where stars become useful, with "nobody has ever used this package" and "Meta/Alphabet pays to develop/maintain this package" on the two extremes.
I'm less sure what the signal says in-between those extremes. We have 2 packages, one has 5,000 stars, the other has 10,000 stars - what does this actually tell me, apart from how many times each has gone viral on HN?