Whats with the whole obessesion on "giving their time for free"? What does money have to do with this? It always comes across as a copout, implying you cant disagree with FOSS devs because they work for free. Just because they aren't earning money off off of it (aside from donations) doesnt mean they aren't earning some sort of reward for their work, whether its personal or social.
Besides that, its pretty common to include that type of work on a resume, which is sort of turning that work into future earnings if it helps you get a high paying job.
I appreciate what FOSS devs do, I just hear this victim narrative come up a lot in posts about them. I'm not even sure its FOSS devs posting that type of stuff on here, it might be other people defending them.