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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?
Would the emails you sent to about a million people be enough to prove intent?
This is the oldest scam in the book.
Also, the question is, is it legal. Not whether you are likely to get convicted for it.
The answer to the questions btw are no, and yes. These types of fraud cases are dead easy to prove and LE secures convictions all the friggin time.