USA cycling has established that the highest category of MTB racing is PRO. That means you will get a PRO license (if you are good enough) and you can call yourself a Pro mountain biker even so you don't make a living at it. I think this muddies the water and takes away from the real pros which have a hard enough time making a career out of riding and racing bicycles. Is it time to rename the fastest MTB class to something else?