Because the results have just been awarded a prize or were not willing to risk all people are not the only award one award to miss a chance to win a prize, the prize can be small.
The results have just been awarded a prize or not people take risks and the rewards are not the only to miss the big prize, you can also have a chance to win.
Because the results are just being a prize or not be awarded to gamble the award is not only one prize to miss the big prize can still win a small prize.