Cashiers in supermarkets and shop assistants in stores usually do not have high salaries. But if they are engaged in carding, they get 5-10 times more money. When you make a payment with a card, the cashier or seller can look at and remember the data unnoticed . For some sites, when ordering products, the card number and CVV2, which is written on the back, are enough. But the carder can go further and put its own «reader» to read all the card data. Then on the Internet dumps shop created. You can look dumps shop list in different forums.