It's not, so don't bother. Unless I get some sort of actual payout or prize for the HUNDREDS of ads I watched, I wouldn't come back to play any more. There is no point. If you want a game that actually pays out instantly to PayPal, Bubble Cash does.
Granville's Method\n\n Granville, this strategy involves card selection based on the idea of number balance and probability in the long run. His strategy assumes an equal number of high and low, even and odd, and numbers ending with 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 will be called.