Github PLEASE work on some kind of 'Proof Of Activity'

98% of my work is private and all employers get to see is about 100 open-source commits when I have roughly 4,000 commits throughout several private organizations. I know I need more open source contributions but I should be able to prove to an employer that I am a heavy Github user and have more experience than 100 commits.

Sometimes I've been asked to send a screenshot of my total number of commits, and happily oblige to the odd request but a screenshot is not even worth it's weight in the physical world (aka nothing).