Because checkers like Cronos put an immense strain on payment gateways and cause high chargeback rates, businesses use several layers of defense:
It is important to be blunt:
It sorts results into "Lives" (working cards), "Deads" (declined), and "Unknowns." The Dark Reality: Legality and Ethics
However, understanding what this tool is requires a clear look at the ethics, legality, and risks involved in the world of carding and automated credential testing. What is a CC Checker?