When I see "mail.ru" and "gmail.com" listed as major FOSS contributors without any nuance that these are private emails; unrealistically bloated representation

When I see "mail.ru" and "gmail.com" listed as major FOSS contributors without any nuance that these are private emails; unrealistically bloated representation of microsoft; noting that yes Linux is a main driver of FOSS activity and is on github, but not noting that activity does not take place on github and is just mirrored there; Stack Overflow is supposed to be a critical assist for FOSS, I am afraid for all its charts and graphs this doesn't really understand what it set out to describe.