Some grocery stores offer gas discounts for every $100 spent on groceries, regardless of how long it takes to spend that amount. These grocery stores illustrate the use of a reward system.
This is the term that is used to refer to the system of appreciation that the owners of a business would have to forward to the people that conduct business with them. The people make use of the reward system as a way of getting the consumers to keep coming.
Hence we would say that the use of the discount for the amount spent would be an example of a reward system.
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