I'm not sure how accurate StatCounter is, given that most Linux users use adblockers. However, according to it, Linux has almost a 14% desktop share in India.
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
While it is free to download it, the license still costs. Though they seem to let you use it unlicensed for an unlimited amount of time with some restrictions (like not being able to change the background image and an ever present watermark). At least this was true for windows 10. No telling if/when they will drop that feature though, especially if loads of people start using it unlicensed like that (though I doubt that has any effect on people using it that way or not).