> The GitHub repositories are read-only for the present
I'm not sure what this is trying to say. Surely, every repo on github is read-only (except to the maintainers)? Otherwise, a random bot would insert spam into every project. In fact, many decent-sized projects have single person as the repo maintainer. A single maintainer can pull in many other peoples' branches/commits easily.
(FYI, github does also support giving others commit access.)
You can say the repo isn't active, but it's always going to be read-only (except to the maintainers).
> the FAQ page solicits patches by email
Here, they show that they aren't familiar with how github works. The correct way to work on github is to fork their project (there's a big button on every page), commit to your copy, then send them a pull request. It's all nicely managed by github.