@thibaultmol
Asking people to sign up is a red flag, period. Most people don't even have more than one set of email/password, but reuse the same everywhere. Each new place they sign up makes that security problem larger*
Also, you forgot the word centralised: ...of centralised Git platforms.
Which is a pretty bit omission when Git itself is decentralised - like Mastodon.
Of course the Mastodon way of doing it would be to implement ActivityPub and count each favorite as a star.
*) For me it's the opposite Signing up means having to go to my deskto pc, dig out my password manager, unlock, generate a password... That's enough time wasted that I ought to charge for it.