There are several ways for retailers and merchants to accept credit card payments, as payment terminals have evolved throughout the years. Adding new layers of security to the most common form of payment is of great importance, Especially when considering how card payments have always been subject to high amounts of fraud...
http://www.newsbtc.com/2016/05/15/visa-wants-maximum-revenue-regardless-retailer-concerns/
What a surprise! Visa's days are numbered and they know they have to grab what they can. What they charge small businesses to accept credit cards is ridiculous. My local pet store has now upped the requested amount spent to use debit/credit at 15.00 due to high visa/mastercard fees! What is the point of accepting it and it seems a backwards move back to cash - plus no cashiers know how to give change anymore.
Merchants are on the wrong side here. If I had a store I would directly stop accepting these nasty payment options in my store a long time ago. If ridiculously high fees aren't enough reasons for merchants to stop accepting Visa, then what is?