@zukecruiser
Most card transactions in Oz are tap-and-go, or wave, or swipe, for amounts up to $100 or, in some cases, $200. Over that you will need a PIN.
Most businesses include the the bank fee in the price, a few don't. I bought something this week and noticed an added card fee of 1%.
I can't remember the last time I signed for anything, well, that's not strictly true as I did sign for coffee and bar drinks in Alaska earlier this year.😉