It seems to have plateaued and increasing more slowly. Combining data from Steam and Statcounter reveals this:
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
Fair point - bureaucrats aren't always good at nuance. :/
Although I still hold out hope that with Linux, there's room for the open/volunteer approach + a for-profit model that results in investments/profits going back into the volunteer community. After all, Linux isn't controlled by a corporation for proprietary purposes, like Windows is by Microsoft. We'll see...or we won't, if Linux never reaches any kind of mainstream status. :)