It's lunch time in the real world, at the real job. Rather than eat, I decided to take a stroll up through the shopping center my job is located in. I stopped into one of the little convenience shops for a soda, and decided to put the drink on my ATM / DEBIT Visa Card. As I handed the clerk who was of middle eastern descent my card, he looked curiously at me, and then pointed to a piece of paper taped to the counter. It read "Minimum purchase $5.00 for credit card purchases." This is when I think, "why me?" Actually I'm thinking, I could stand here and argue with this guy, who more than likely would give me a dumbfounded look and probably curse me out in his ethnic language before he'd sell me a soda on a credit card. But the truth of the matter is he'd be wrong. What I ended up doing was picking up a couple of other things and complying with this Pepsi terrorist's demands.
The truth of the matter is I used to work for a credit card processing company, so I happen to know a little about the rules. The company called Card Service International was purchased by the monolith First Data Corporation back when they were expanding from a small garage business into a massive Simi-Valley company. As a part of the company training, this was one of the first questions that arose from us credit account managers during the class. The answer is that it is 100% against the bylaws of both Visa & MasterCard to require a minimum amount before a merchant can run a credit card. It's written in their contract they sign when they apply to become credit card processing merchants. Now they can do whatever they want on the ATM portion of the card, but if the transaction is ran through as a credit card there can be no minimum.
But when is the last time anyone in America has read their contracts?