At least at my company, it’s normal to have technical writers, project managers, etc. have GitHub accounts as well. I could easily see them getting to 90M active users, regardless of how many programmers there are.
On my team, 30% of the Github users are not programmers. Product managers, testers, designers all use Github project management and create issues for developers.
I had a Github account for years even when the only programming I could do was write “hello world” in Javascript
Putting that in perspective, GitHub has around 1% of the global population as an active user.
The usual estimate is that there are about 20-25M programmers worldwide. So probably not.
No.
Usual estimate is ~20M.
High end is usually ~23M.
It doesn't grow that fast.