Github isn't Facebook, there's hardly any network effect involved (the actual network is the World Wide Web itself). The main issue is all the information that

Github isn't Facebook, there's hardly any network effect involved (the actual network is the World Wide Web itself). The main issue is all the information that is Github-exclusive (like the "issues"), which AFAIK is extremely valuable for youtube-dl, and also AFAIK cannot be (easily) exported. But then developers should have know better than to put all their eggs in someone else's (Microsoft's !!) centralized and locked basket. If Pirate fricking Bay is still up after all these years, so can be youtube-dl repository/ies. EDIT : probably an even better example : Popcorn Time