I don't think this game has a big an appeal as a new Mario game. Some people prefer playing games instead of making / redesigning levels and for many of them, this still isn't as creative or as open as LBP.
It probably doesn't help that Nintendo has strict YouTube policies as with LBP a lot of the other sales came through the amazing videos being uploaded and shared.
If it hasn't already, I think it will sell a million and probably go on to do 2mil by the end of the year, it's Mario after all.







