I wonder how much of a social network it really is. What's the value you get out of other people having their OSS projects on GitHub? Yes, it's all on one site/

I wonder how much of a social network it really is. What's the value you get out of other people having their OSS projects on GitHub? Yes, it's all on one site/domain but if Google Search is your entry point, does it matter if the OSS code lives on Bitbucket, GitHub or GitLab? 4 years ago I thought that my GitHub account will get more important, the identity will matter but is that really the case? I don't see the typical network effects and behavior of a social network. I think all there's is the perception of GitHub being the default choice. That's powerful but far less powerful than truly increased value for me as an user because of the size of the network, you being an user too (eg. Twitter or Uber).