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)
We have some reasons to suspect that one of several parties (possibly not in the UK but having connections here), having suffered major and very expensive setbacks, may look to harm the messenger one way or another
Could the FSF not find any law firm that, in addition to talking about or for Free software, does not use .NET, OOXML, and almost everything Microsoft?