Lol.
Most games I play I will play for the first month and then stop.
Those 64% of people will be made up of:
1. Gamers who bought it and see it as a game (which is what I would do) and who therefore go through most of it and try and improve a bit before they decide it's pretty much complete, and move on to another game. (perhaps coming back to it in a few months like I do wth Wii Sports)
2. The same kind of people who buy fitness equipment only for it to remain unused in the garage.
I am actually suprised so many people are using it everyday, I would have thought it would have been more of a 1-2 times weekly thing for people.