@manton Are you sure about that? I thought that Apple Pay didn't end up sharing actual card info. At least that's how I interpreted the privacy and security section of Apple's Apple Pay information
When you make a purchase, Apple Pay uses a device-specific number and unique transaction code. So your card number is never stored on your device or on Apple servers, and when you pay, your card numbers are never shared by Apple with merchants. (Emphasis added.)
@manton hm that does say explicitly "Apple sends your Device Account Number to the app or website along with the transaction-specific dynamic security code. Neither Apple nor your device sends your actual payment card number to the app." So I wonder if somehow the last 4 of the real number are sent to the processor too.