I'm sorry, what do you mean by this comment? If they use MIT licensed software there's no obligation for them to contribute back anything, not that it's good or

I'm sorry, what do you mean by this comment? If they use MIT licensed software there's no obligation for them to contribute back anything, not that it's good or bad, but it's the terms of the license. Also there's no way to know if they have contributed or not, and even if there's no direct contribution (pull reqs) we can't know if they haven't reported bugs or supported employees that wanted to collaborate to the projects on their free time.