'Out of control': No one knows how much to tip |  CNN Business

‘Out of control’: No one knows how much to tip | CNN Business

New York CNN — A new payment trend is sweeping America, creating an increasingly inconvenient experience: digital tip jars. You order a coffee, an ice cream, a salad or a slice of pizza and pay with your credit card or your phone. Then an employee standing behind the counter spins around a touchscreen and slides …

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