I'm not an expert on the security CC companies use, but it doesn't seem too difficult to imagine they would have a way of tagging the cards with tracking data each time you swipe it so that if the magnetic strip is copied, they could track it. The company knew exactly when the cards were copied. I pictured a server swiping the card on their own device and then using the restaurants swiper.. They copy the magnetic strip, make new cards from blanks and then sell them all over the world. Make them all summer.
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