See, I'm here with the mindset that most Smash fans are blinded by their love for Smash that they don't realize that not all Nintendo fans are Smash fans. It also isn't the best selling series for Nintendo (it was the best-selling GCN title with Double Dash close behind). Smash fans are definitely the most fanatical and the ones who would go out of their way for something, but there aren't as many hardcore fans as many believe there are.
At local cons in my area, in the gaming room the Smash area is almost always empty. Particularly melee.