As HarryT pointed out, one of the most popular uses for NFC cards is for transportation. Japan has SUICA/PASMO, London has Oyster cards and in Sweden we have Jojo (for some reason they require inane names) cards, you can enter a period or prepaid amount, if prepaid the entry point is recorded when you pass the stalls and then when you exit the required amount is deducted. In congested cities it saves a lot of time getting on and off. Once you have it in your CC you won't need the transport specific cards. You can pretty much program them for anything and everything.
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