The Suntrust Delta Debit card was a lucrative mileage-earning tool for a long time. I’ve been writing about it since 2009.
Since it’s been a debit card that earned 1 mile per dollar charged, it’s been useful to many in the past buying money orders and depositing those back into a bank. And it’s been a highly efficient way to earn miles for paying taxes since debit transactions incur a miniscule flat fee while credit cards incur a pretty hefty percentage of the total payment.