When has Mach ever been marketed?

In the time I've been looking at CNC, I can not remember any marketing for it. All I remember is it being recommended by lots of people, and it being the accepted standard, as until fairly recently, nothing else came close in terms of flexibility/ease of use/price.
You've got to remember that until a few years ago, linux itself needed a fair bit of knowlodge to get a somewhat easy to use setup.