If you're hiring based on GitHub profiles, you're absolutely doing it wrong. I've seen plenty of total idiots with flashy GitHub profiles, and many -- if not all -- of the best coders I know have essentially nothing on GitHub.
A GitHub profile page is a strong signal only that you have a GitHub account. Any other use is strictly off-label.
Punch cards, followers, stars on the repositories of the user, important contributions - all are available at a bird's eye view. You are missing the point if you just check whether the person HAS a github profile.
A GitHub profile page is a strong signal only that you have a GitHub account. Any other use is strictly off-label.