I think for the right price people would be interested. There will always be the hard core shooters that dont care what their rifle looks like, as long as it shoots. I'm sure there are just as many if not more people who dont mind spending a few extra dollars on a favorite rifle to jazz it up a bit. For me, the $60 US I spent, I figured why not give it a try. It's only $60. But if I had to pay $175 for the fluting, forget it.
Im sure its pretty time consuming to get a CNC machine all programmed to do the fluting, but once you have that program or a few various styles, the ammount of work after to do the fluting for others would be minimal.