If you download the Clark's app for your smartphone there is a one time promotion where you'll get a 50 cent a gallon credit. Pump your gas, take your receipt inside with the app, don't press the button to show the promotion until ready, it will time out in 3 minutes and be gone) and you'll get a Marathon gift card. Sweet deal. We've used it on both of our iPhones and now have a $12 card.
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