The concept of carding
The concept of carding is simple: to obtain valuable payment card information and use it to make profits. For example, carders (e.g. Ccdumps2018, Fullzshoponline and Dumpcardsites) create bots to hack gift card balances. During carding, hundreds of merchants can be targeted
Bots quickly go through gift card numbers and request balance of every card. Once the bot tests all cards, it creates a list of valuable ones. Carders can sell these lists or buy something for themselves. For an online store, carding looks like a high shopping card abandonment rate or low average shopping card size