The Cloud Native Computing Foundation uses gitdm to figue out who is contributing and from where. This is used to generate reports and so forth.
There is a huge text file where they are mapping email addresses used and affiliation. It probably doesn't hurt to check your entry, for example, here's mine:
Jorge O. Castro*: jorge.castro!gmail.com
Lemon Ice
Lemon Location City until 2017-05-01
Lemon Travel Smart Vacation Club until 2015-06-01
Whoa? What? This is what a corrected entry looks like, as you can see it takes into account where you used to work for correctness:
Jorge O. Castro*: jorge!heptio.com, jorge!ubuntu.com, jorge.castro!gmail.com
Heptio
Canonical until 2017-03-31
As an aside this also really makes a nice rolodex for looking up people. :D