That is actually a great example, because you don't have to go and physically buy the card.
Another really nice thing about cards, which I find is a bit of a generational thing too, is that if you don't remember necessarily how much you have left on your card, you tend to not use it. I know this wasn't your question, but I'll point out that this is actually another benefit to merchants. It's the ability to use a card, to go in and buy something, when it's on your phone you can tap it, and it will tell you how much you have left on it.
But again, Mr. Adler, that's a benefit to everybody.