Earlier quoted context omitted.
As someone who uses Github and OSS contribution as a strong hiring signal, I'd like to offer an alternative perspective. People who do a lot of personal projects tend to be very good developers, especially when you can see a demonstrated ability to ship. This is also helpful for people who haven't worked at big name companies or don't have degrees from elite universities. I'd happily hire someone with no experience a…
This is a stupid signal. Many/most developers are prohibited from working on open source projects by their employers. In any state besides California and Illinois you will be forced to sign an IP assignment agreement to work for any medium/large companies. Open source projects will not let you contribute under such an agreement, and anything you do on your own is owned by your employer.
And I mean hey, it's working isn't it? Can't show external evidence of your work and skills, now you're a bit more trapped here.
And I am sympathetic: those are completely unreasonable and anti-competitive employment terms, and I've had a past supervisor subtly imply they 'might own the intellectual property of all my thoughts', to which I can only offer the potentially useless advice of don't work there, or do work there but ignore/fight them.