In this variation, the would-be victim is told they’ve won a major award, then instructed to purchase a Green Dot (or other brand) card, load it with a specific amount of money, then call the scammer back with the card number and PIN.
What would happen next, of course, is that the scammer would use this information to unload the card and leave the victim without a million dollars or a Mercedes.
It’s easy to see through once you take a step back: the out-of-nowhere call informs you of your fabulous prizes, the bizarre instructions to claim said prizes. The fact that, once you give someone a Green Dot card number and PIN, whatever money is in the account is as good as theirs.
You know what would be awesome? If they ever catch one of these scammers, instead of sending them to jail, forcing them to actually deliver the prizes they promised. “What? Six months in jail? Pfft. Oh, no. You told 106 people they’d won a Mercedes and a million dollars. Now cough ‘em up…“