I did not know that that was the whole point of the thing…
My first (and only) time in the US I got my breakfast paid by a complete stranger at the office canteen.
I had no cash and was trying to find my card’s pin so in practice I was delaying everyone queuing at the till. When that lady paid for my breakfast and wished me a lovely day with a big warm smile I felt grateful, relieved and somewhat ashamed… I thanked her and left with my tray, thinking how kind and generous are people in Massachusetts.
I pay drinks and coffee for people sometimes, but this was a totally different experience and now I’ve learnt what it was about. Thanks!