And yet they do anyway. Netflix contributed network code to FreeBSD. In so doing, they took code they had developed and handed over the maintenance to the FreeB

And yet they do anyway. Netflix contributed network code to FreeBSD. In so doing, they took code they had developed and handed over the maintenance to the FreeBSD team. I think this is the biggest incentive companies have for making contributions to open source: they don't want to pay engineers to keep maintaining their own patches forever.