i have no idea where they get their data from… but they have a nice ranking page… not sure if that is a true good representation of the market though.
it is crazy… in 2017 – Linux has ONLY 1.6% market share on the desktop/laptop.
On mobile it is dominating 😀
There are allready more Androids devices and users out there than Windows users 😀
That’s why i tried to put together a USB Stick that runs on almost any hardware i have tested it with: http://linux-workshops.de/ideal-linux-stick/