I would think that legally there must be, that's always in the fine print of these contests so you can prove that they're not being fixed. But I have no idea if it would be worth the trouble to find out.
What was neat, if you saw the show, was the lady in the middle (white) game won her game so fast (only drew 7 balls) that they knew nobody at home had won, so they asked her to keep drawing balls out. So there's a neat technical question there of how they knew that. They know ahead of time, regardless of how many tickets were actually printed, how many of each they generated.