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For sure. "Bring the card to the device" and "bring the device to the card" seem about equivalent to me in convenience unless the device is something that the waitstaff is going to carry all the time anyhow.

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In one scenario, the waitstaff disappear with your credit card for an extended period of time. In the other, the card never leaves your sight.

Well, from the customer standpoint, it's one trip from the server versus two.

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