Someone did a study that suggested the network effect is logarithmic in nature, but if that’s true it means something with 95% market share is 3 times “better” for having everyone there. Not 20 or two orders of magnitude better but not nothing.
Please could you link to the study if you can find it. The definition of "better" seems quite critical here, as well as whether it's specific to code hosting websites. A messaging platform is pretty useless if I'm the only user, but Github would still be useful to me without anyone else having an account.