Re: Tokens "...when a card is swiped..."
I was confused over MST/NFC too. Hadn't heard of MST before. Happily, Sammy has what looks to be a reaonable explanation at https://www.samsung.com/us/support/answer/ANS00043949/
So MST is a contactless way of replicating an actual swipe.
Me though, I prefer bonking.
