Of course, but if you read what the site is doing, it is treating it as if it is in randomly picking a unique bracket.
I don't know what statistical method they plan on using, but Nate Silver/FiveThirtyEight already put out percentages for the whole bracket based on statistics/matchups[1]. It wouldn't be too hard to hand out brackets generated using the highest percentage brackets from something like that.
I still don't think it will work. Even if a million people took part it would still be like a 1:1000 shot at best. And assuming they did distribute it evenly (don't think this is really possible given taxes and everything) at a million people that's only $1000 per person.
[1]http://fivethirtyeight.com/interactives/march-madness-predic...