Not content to simply let players observe each battle, Nintendo has also included a betting system, where players can use their hard-earned coins to wager on combatants during each Brawl battle. Winning can pay off big, but Nintendo has sweetened the pot even more by promising copious amounts of stickers to all the spectators, with the potential for "extra prizes."
Of course, regular paranoid Wii online limitations still remain: you won't be able to see the names of any of the players you'll be watching, and Spectator Mode matches you with upcoming online battles automatically, so it doesn't seem like you'll be able to follow one fighter over a number of matches. And we don't even really know what those coins will do in the game. Still, everyone likes gambling, right?