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The vending machine in my Apartment bldg has a sticker saying that credit card price is $0.10 more than the stated price and to use cash/coin to get the stated price. The machine does not accept bills or coins.

I should add because I cannot edit my comment that some of these parameters have changed in the last few years, however, it various by jurisdiction. Also, the universal incumbency established by these players was deeply entrenched before such programs were relinquished.

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