git is distributed. You can give access to a mirror of your git repo for execs that don't access the repo or contribute to it. They don't need to be github users, they just need git access to an url. If github is still convenient for you, there is a solution to avoid paying for this users. It only really makes sense to have developers added as github users (of course, it used to be convenient to just ask them to be github users, but it never really made sense)
I know git is distributed, that's not the point. Github as a platform is convenient and understood even by non technical people. They can browse files, even edit on the web.
I hope they create a stakeholder account for that. But it is wrong to put all your eggs in one basket. Github is nice to show to non technical people but it is definitely an over kill.
