I wondered that about boxing. Why is it that boxing never suffered the same fate as MMA. Or did it at one point, then lose it's fad appeal and return to the hardcore? You have people who are strictly fans of boxing, but they don't seem to walk around in EVERLAST hoodies and hang 12 oz. gloves from their rear view mirrors.
For the record I am a believer that even if GSP was dry as a bone and missing an arm he would have beaten down Penn that night and I wanted Penn to win.