![9: Illustrations of the reward and coupon kit sent to respondents after... | Download Scientific Diagram 9: Illustrations of the reward and coupon kit sent to respondents after... | Download Scientific Diagram](https://www.researchgate.net/publication/326032214/figure/fig8/AS:642392361271296@1530169682096/Illustrations-of-the-reward-and-coupon-kit-sent-to-respondents-after-they-completed-the.png)
9: Illustrations of the reward and coupon kit sent to respondents after... | Download Scientific Diagram
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![PSA: Check your grocery store receipts! Sometimes they offer a small coupon if you take a survey. It isn't much, but a minute or two of your time could save you a PSA: Check your grocery store receipts! Sometimes they offer a small coupon if you take a survey. It isn't much, but a minute or two of your time could save you a](https://i.redd.it/tybf30t7oih61.jpg)