Thanks for writing your post @belka, I found myself frequently nodding in agreement while reading it.
Since I was the person brought up the issue, let me just specify exactly what I meant.
Access to GitHub from some countries is restricted; sadly this is true with other gratis hosting services. How much this conflicts with the All are welcome, all can contribute statement from the Foundation homepage is a matter for the Foundation Board of Directors to decide.
I understand choices as such are never easy and that there is a powerful network effect in place we cannot ignore, not to talk about the resources needed for self-hosting.
@snoyberg’s post contains many good proposals.