[userbinator]

I mean, many (most?) of software engineers are directly working with free software every day.

I think there's many more working on proprietary software, we just naturally don't hear about it due to its nature. Open source is prominent only because it's public.

[drdaeman]

Yes, I meant that lots of proprietary software links with and relies on FLOSS components.

E.g. I open Slack (a random pick - it's open on my desktop right now), a proprietary software app. And in the "about" section there's a huge list of FLOSS libraries they use: https://slack.com/libs/desktop

Moreover, I'd say, every website out there (and web is a giant niche) uses lots of FLOSS components.

And for GitHub contributions, I meant that once in many years there happens to be a library that's out of date but otherwise useful, or lacks some nice feature.