Tem algum lugar explicando o critério?

Parece que não. Achei essa thread no Twitter do autor: https://twitter.com/aykutkardas/status/1739295370713166282

@aykutkardas: What is your pricing algorithm? ☺️ Fun project by the way!
@shyam_tawli: Using variables that are displaying, stars,. contributions and followers with a basic formula

@zero2fullstack: Seems that the main "factor" is the contributions. That is divided by 4 😊 I didn't figure out what is the formula for the starts and Follower
@shyam_tawli: try try you will get it, simple not so difficult

E aqui também: https://twitter.com/rogeriotaques/status/1739497833353584916

@rogeriotaques: What base do you use for valuing the account, e.g: how much is a commit worth?
@shyam_tawli: getting three variables stars are more worth than follower and than contributions