In general companies won't pay people to do things when they are willing to do it for free. There are exceptions. Linus Torvalds is paid by the Linux Foundation

In general companies won't pay people to do things when they are willing to do it for free. There are exceptions. Linus Torvalds is paid by the Linux Foundation, which is funded by big corporations https://www.linuxfoundation.org/about/members https://www.linuxfoundation.org/about/members .