A cash payoff game was applied to increase use of Automatic Teller Machines (ATMs) by bank customers. ATM users could win either $5 or $100 by playing the game. Cash prizes were awarded based on a predetermined set of probabilities controlled by a central computer. The probability of winning was higher for customers who had used the ATMs at low rates. The game produced an increase in (1) the number of cards used, (2) the frequency of uses per card, and (3) percentage of transactions carried out on ATMs. Increased ATM use was maintained once the game was withdrawn.
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McNally et al. (1989) studied this question.