[QUOTE=CarnalK]
I feel like taking a crack at paraphrasing cosmosdan’s two main points, as I see them.
You, Visa and the Merchant are in a three way agreement. You have chosen a Visa account because it has promised to line up agreeable Merchants. The Merchants contracted with Visa, and thus have agreed to be agreeable, so as to attract Visa’s Yous. People here are mainly mad at Merchants for not abiding their contract with Visa. cosmosdan is suggesting you be mad at Visa for not honoring it’s contract with You.
Also, at least give the benefit of the doubt that the small shop owner is acting in good conscious when he believes he must set a minimum charge.
His secret underground point: Realize that supporting local businesses might actually trump pure dollar values for quality of life equations, you geeks. 
[/QUOTE]
That’s it in a nutshell friend. Good summation. 
Here is an interesting article about gas stations changing their pay structure for gas and offering a cash discount.
I found this statement pretty telling.
Not hard to figure is it? CC companies use gimmicks like miles and cash back to encourage customers to use their cards for more purchases. Do they do this because they are benevolent entities and deeply cherish their customers? They do it to make money which is the basis of any business. More CC use,= more transaction fees= more profit. For them These transaction fees are paid for by the local merchant and cut into their profit {the reason they have a business} so they are looking for a way to pass this cost on to customers. It’s business plain and simple. Extra service is not free to provide and customers can expect to pay for it.
I first started working retail in Sears many moons ago. I remember a customer saying back then “I know I pay a little more at Sears but I don’t mind because of the service”
That customer understood the connection that better service costs the store more so they have to charge a little more to provide it. The consumer is free to choose better service at a higher price or lower prices. Over the last two decades customers have told retailers that low price matters more than good service and retailers have responded. Now we see the increasing trend and the move toward a cashless society. Swiping the card is so convenient. That’s fine, but it cost money for the merchant and they are trying to find a way to defray that cost. If you want the added service and convienience you have to expect the expense.
Lots of people have said that accepting CCs brings in a lot more business. I think CC use has been pervasive enough long enough and that is no longer true. People buy what they want and/or need. I don’t believe most merchants see increased volume simply by accepting CCs. They do see increased overhead in the form of CC fees when customers pay for smaller purchases with CC rather than cash.