Well one market makes money selling the OS and the other market does not.   If you have a problem with the one you paid for you can take your problems to that company that sold it to you.  Or as the case here for windows 8 come to C9 and complain.   Linux is just code you take the responsibility for.   It gets popular because you can take it and make it what you want.  I would argue that Linux has many flavors and each flavor should be counted as a separate OS.