Carders, such as Feshopcvv and Validcvvshop, use their own channels to obtain account information and either resell it on carding forums or buy goods and services. They usually buy and sell credit card numbers in bulk. The data is often obtained from entities that own large amounts of information, such as financial institutions, data processors, merchants and so on. At the beginning, carders could only get a few pieces of info. Fullzshoplist, Creditcarddumpsforsale, Ccfullzshop and other carders now know how to get access to full identity packages that include multiple types of sensitive data.
Carding means a usage of someone else's credit card information to buy services and goods from online merchants. In the bank industry, these transactions are considered "card-not-present". In order to prevent these transactions, cards have added a card verification value, known as the CVV2. As a result, carders, including Bestccdumpssite, Trustedccshop and Fullzccshop, should process the CVV2 in order to initiate carding. Consequentially, dumps that contain CVV2 info are much harder to get and they're much more valuable. Dumps can be found on various forums on the dark web.