When paying for your groceries with a debit card, you earn miles on your cash advance. So, you purchase 100.00 worth of groceries and add $50 for cash back, your receipt will indicate at the bottom "You have accumulated $150 toward your next United Mileage Plus award!"

BTW, I know some people will say that loopholes such as this should not be publicised but I disagree. Share the info with as many people as possible before the mistake/loophole/glitch/etc is discovered. The idea of having a "private" subscription list is nonsense since anybody can ask to receive a mailing; including those corporate lurkers among us.

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