You have to make your idea ("in whole or in part") public if you become a finalist-- you're required to make a "finalist video" to post online to be voted on.

You have to make your idea ("in whole or in part") public if you become a finalist-- you're required to make a "finalist video" to post online to be voted on. Votes don't count towards judging, though the judges will be aware of the votes. Incidentally, is there any data available as to the survival/success rates of startups who won these types of business plan competitions?