$1500 prize is an enormous amount to reward the users periodically.
Certainly there will always be a lot of competition for a share of that prize. It also shows how profitable this casino is!
Most of the user that participating in the tournament do a calculated gambling therefore they weigh in already the potential profit and loss if they compete on this kind of tournament that push user to wager huge volume to win that prize.
I'm still wondering what makes a user to wager about $60,000 volume for a $600 prize, is that user really doing his thing while the prize comes thereafter or the user deposit for chasing the prize?
I'm getting to understand that you'll win if actually a player is doing his thing, not minding the prize, than a player that deposit chasing the prize.
Bettors with very high stakes are placing their normal bets; they didn't necessarily deposit all that money to participate in the contest. It may be true, but they're usually already betting and taking advantage of the contest. And even if they bet all that money just for the contest, they'll make a profit at some point, so it's worth it.