Yeah, it's funny how things like that work. When I started using Apple Pay in Canada with my U.S. Visa Debit card before it launched in Canada, I once paid for a prescription at the drug store that was well over the usual $100 contactless limit. The terminal accepted it, but spit out a receipt with a signature block. The pharmacist was actually surprised by that, but she shrugged and said with a chuckle, "Well, I guess you have to sign this..."
Then there was the cashier who wouldn't let me use Apple Pay because she thought I was trying to "hack" the terminal with my iPhone ?
However, on the flip side it was somewhat annoying as many terminals wouldn't even offer contactless payment if the transaction was over $100. I guess some retailers got tired of people trying to tap to pay, having it get declined, and then having to reset the terminal and ask them to insert their card instead. Even after Apple Pay launched in Canada that was a common problem, despite AMEX not having a tap-to-pay limit via Apple Pay (at least not when used with a modern CDCVM terminal that can tell the difference between a plastic card and an iPhone).