While living with me briefly as an adult in late 2016, my son got one of the ones who were trying to sell him immediate tech support and anti-virus "repair" on his PC. Except we were both techies and he knew scam, so he kept the guy on the phone by being deliberately obtuse about giving over his 'card' number'. He'd read him his library card number, his gym membership card number. By the end, I could hear the guy on the other screaming loudly "SIR, VISA OR MASTERCARD, IT MUST BE VISA OR MASTERCARD!" thinking my son was developmentally delayed and he was suffering but boy howdy he would hit that damn jackpot if only he kept pulling the slot machine's arm.
Son-Prime and I still laugh about that one from time to time. Every once and awhile, when I help him out financially -- not so often now, since we got him over the heavy lift, and he's too proud to accept help on the small things -- one of us will find a way to slip "VISA OR MASTERCARD!" into the conversation.