Python cryptography, Rust, and Gentoo

Even if you disregard official associations (which in my experience will show up as "member" or "collaborator" or somesuch), I think it is useful to distinguish developer and contributor.
A better way to assess involvement would be

https://github.com/pyca/cryptography/graphs/contributors

This seems to indicate that Christian is 19 commits (at the time of writing this), which would make him a somewhat regular contributor.
At least I would not consider myself "a developer of ..." unless I'd be more heavily involved. (Of course, there are also contributions outside commits, but if you chose that metric, the above stats page seems a better source than the "committed..." line in the hover.)
One caveat is that it seems to only work with Name matches or github ids or so, so I've seen it being quite off when people switch (work, typically) email.