Good. That's how FOSS is supposed to work.

Codeberg isn't competing against Github for market share, it serves a specific demographic with a specific ideology. Anyone is welcome to use any other host they want for their crypto and AI projects, with whatever policies align with their preferences. Or make your own with blackjack and hookers.

There shouldn't even be "default choices" or "huge network effects" in FOSS anyway. That's just another form of centralization.