Coupons
Sally bought a coffee at her local coffee shop. On the receipt was a survey. For completing it, Sally got a free donut-which she redeemed at lunch. Then she was given another receipt with a survey on it! Sally realized she could get limitless free donuts!
Sally realized she could get limitless free donuts! Then she was given another receipt with a survey on it! Sally bought a coffee at her local coffee shop. For completing it, Sally got a free donut-which she redeemed at lunch. On the receipt was a survey.