Comment by AretNCarlsen

This particular situation is more nuanced than the usual profit-from-the-poor story. Every bank and credit union receives these fees, and in the case of not-for-profit credit unions, the interchange fees truly support[ed] "free checking" accounts. Whereas merchants can lower their prices to pass the money back to the consumers (but won't), banks, conversely, have nowhere to recoup their losses except to charge the debit card users. I would rather see an honest fee like this than watch as overdraft penalties are raised to cover the lost revenue.