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...the next pick to the people who saw you pick the "winner". Now half of those people see one team, the other half see you pick the other team, and whoever saw you pick the winner thinks you've got a 100% accuracy rate over two games. You could do that for a while and then offer to sell your pick for the Superbowl. Starting with a big enough group in the beginning, this might be really lucrative.
But is it legal?
If there is a scheme that feels immoral and leads to you gaining money, you can bet that it could be argued as fraud in court.
Yes, pretending to be all knowing to take people's money is fraud. No matter how cool the method to make that appearance of knowledge is.
What you really gotta argue is what youre providing is the 'service', they come to you for the experience of being touched by a higher power, the blessed vision of wisdom - and they simply donated to support such greatness