Is that true for debit transactions? I always thought that credit card purchases cost the retailer money, which went to the credit company and/or rewards programs and/or banks, but that debit transactions cost the retailer nothing but cost the bank.
Debit transactions do cost the merchants, just not nearly as much. I think it's on the order of a transaction fee + .5% for debit vs transaction fee +3-4% for credit.
Right, they are still making money off of every transaction. It seems ridiculous to discourage debit card use. They are just greedy and want to charge both customers and merchants for essentially being a middle man and adding little value to the transaction.