Top of this list used to be particular versions of Ubuntu
Summary: GNU/Linux "market share" in Steam grew by a quarter this past year, boosted by SteamOS perhaps, but watch the trends in distributions; even the Ubuntu-based distros aren't near the top (and SteamOS moved from Debian to Arch, so expect Ubuntu to stagnate further)
Surely if we had properly-functioning media, then someone would investigate this rather than rely on official statements from Microsoft and WARN notices
In the domain of Free software, there are very few sites out there that offer exclusive coverage on community affairs and there are many gagging/censorship attempts