How would such a repository be maintained?
Scenario 1: Every script author who ask for it gets write access so they can push their scripts and update them.
That's a little dangerous as there would be no protections on who can edit what (git history can be rewritten...).
Scenario 2: Only a few trusted people gets write access. Everyone else has to send their script as a pull request and wait for a contributor to review and merge it (a bit like
homebrew).
Scenario 3: A stash-like system with versioning, script categories, ratings, comments... Every ReaScript author on the planet has immediate write access to their own scripts (like
rubygems does it).
Scenario 4: ?