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The airline industry has historically taken a conservative approach to payments
From Why are crypto payments becoming so popular in the private aviation industry?:
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I’ll say. I just had to change a flight on British Airways and despite being an übergold frequent flier and using a British Airways Amex card that I have use approximately a million times before on the BA web site, I had to enter my credit details (including the billing address) just like the first time I ever bought anything on the web back in the 1990s. Not even ApplePay, much less direct-from-account or Dogecoin or whatever it is that the kids use these days.