The other way to "do" open-source as a career (but not really) is just to get into jobs where you're working with open-source technologies. There's lots of job

The other way to "do" open-source as a career (but not really) is just to get into jobs where you're working with open-source technologies. There's lots of jobs doing Linux-based development, for instance. You might not get to release anything to the community, but at least you won't be pulling your hair out working on a proprietary platform.