Plenty of companies hire people full time to work on open source projects - look at all the companies involved in things like the Linux kernel or OpenStack, the

Plenty of companies hire people full time to work on open source projects - look at all the companies involved in things like the Linux kernel or OpenStack, they hire messes of developers who work on F/OSS projects. I work at Red Hat. I've never written a single line of proprietary code in my entire career. And hope never to.