this was no accident.. Those people monitor the spoilage and overs of the cards tighter than the mint monitors the currency. Anyone trying to walk away with scraps is subject to arrest for theft. I can't imagine that those people would allow a flaw like this to go through the multiple approval stages by accident and then allow it to make it to market w/o someone losing their job/jobs..
That being said, it's pretty cool.
This Double Indemnity, as [Billy] Wilder called it, was something that derived from an old newspaper story. Back at the dawn of time, back even before Arthur Krock first arrived in Washington to cover the administration of William Howard Taft for the Louisville Times, a terrible thing happened at the printing plant in Louisville. There was an ad in the paper for women’s underwear, as Krock recounted the episode to a young writer on the New York World, and it was supposed to say, “If these sizes are too big, take a tuck in them.” But as Krock was reading through that night’s first edition, he saw that someone had changed the first letter in the word “tuck.”Krock ordered the ad changed for the next edition, then summoned the printer and demanded an explanation. The printer couldn’t provide one. He couldn’t understand how such an embarrassing accident could have happened. Krock remained suspicious. Two days later, he went and interrogated the printer again, in the interrogatory manner that would daunt future presidents and secretaries of state when Krock became Washington bureau chief for the New York Times. The printer confessed. “Mr. Krock,” he said, trying finally to explain, “you do nothing your whole life but watch for something like that happening, so as to head it off, and then, Mr. Krock, you catch yourself watching for chances to do it.”
— Otto Friedrich, City of Nets.