No. I didn't use a coupon, but have in the past. I figured, if I were to use a coupon it would be better to use it on a subsequent visit in which I wouldn't get miles. I have also hooked each card to a different mileage program (non diners club)so that generally I can get miles on subsequent visits. Just got a DC secondary card for my husband - so it opens another 20% and miles possibility.
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DtG