Exactly my thoughts as well. I am surprised they don't ask you to sign over your soul too! They don't even have to select a winner:
TextWise does not claim or promise to select any Entrant or dispense any money if, in the Sponsor’s sole discretion, none of the entries meet the Sponsor’s Challenge criteria.
So is this the Publishers Clearing House of business plan competitions? String along a bunch of people, pay one that happens to be 78, then run with hundreds of good ideas?
Interesting ploy, but seems a bit spammy and underhanded.