One tree. Every branch is a person. Fork it, build your profile, push it. No accounts — just git.
Every branch is a person. Every group is a repo within the repo. Fork it. Push your index.html. You're live. No accounts. No forms. Just git.
★ Groups: Name your branch group/your-group-name or club/your-club-name to appear in the Groups section. Anyone can branch off your group branch for sub-communities. That's a merge in real git terms — pure poetry.