Understood, and I am raising the possibility that the observed difference may be due to the construction of the Contactless cards, rather than Gold versus Platinum. The Contactless cards are made with a layer of plastic bonded to the metal. The Contactless Platinum card may be the same as the Contactless Gold cards.
How do you use contactless in the USA? Is it basically supported everywhere that chips are? I would rather not scratch up my card all the time... but I don’t want to look like an idiot that doesn’t know how to swipe or inset his card...