Of course we put labor into it. It's not some seance or wormhole communicating with the software dimension.
This is the way FOSS is meant to work. I got jobs where an employer was happy to run other people's FOSS software "for free", happy for me to contribute bugs/requirements/patches back upstream, and happy to release our own projects under FOSS licenses.
It is a win-win for all involved. That's the whole point of it.