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You’re probably thinking of Coin: https://www.cnet.com/pictures/the-evolution-of-coin-the-all-in-one-credit-card-pictures/8/ https://www.cnet.com/pictures/the-

• joshstrange 2y ago
  Coin was cool (I had the beta and final card) but it didn’t work on every POS system (just wouldn’t read) and I didn’t love how easy it would be for a server to accidentally hit the button to switch which card you were using. Chip cards would have marked the end of Coin if they hadn’t gone under before then. I wrote about it on my blog [0] almost 10 years ago, cool idea, failed execution. [0] https://joshstrange.com/2015/07/22/my-experience-with-coin-and-why-it-will-ultimately-fail/ https://joshstrange.com/2015/07/22/my-experience-with-coin-a...