Economies around the world have hit a serious rough patch, and some folks may be looking for work elsewhere. What better way to impress your new employer than to include a link to your GitHub profile so they can check out your skills?
From personal experience, it’s much easier to hire someone that has made their code publicly available, as opposed to just taking their word that they’re good at what they do.
Don’t have any open source projects of your own? Find one to contribute to!