Ah that has answered my question 
I think it’s the payment network that has to do the increase rather than any single card provider.
We basically have three payment networks in Australia - Visa, Mastercard (on terminals this is the “credit” option) and the homegrown Eftpos network (“savings” or “cheque” on terminals). All cards in Australia are dual network - Visa or Mastercard, and Eftpos. Usually anybody using a card can choose which network to use the card on at point of sale. Until recently, all contact-less payments were routed through one of the credit networks as Eftpos did not support contact-less. Now that it does, stores can route all their contact-less payments over Eftpos, which is cheaper than the credit networks. Card users do not usually have a choice of network when using contact-less, but some banks that support Apple Pay allow the user to select which network to use by default on the Wallet app.
Sorry about the digression into how Australian card payments work
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Well in Canada (and I think also in the US) there is one network, but there are multiple “settlement handling entities” (I’m sure they have a better name I am unaware of) that hook into it. The customer has no choice on the settlement process, it is up to the merchant. There are fees, but frequently the user doesn’t pay them, the merchant does. (There are are some banks that still charge per transaction or have some limit and charge if you go over… whereas in the US (not yet in Canada) there are banks that PAY YOU to make transactions because they get a slice of it from the merchant.)
My understanding is that the largest retailers (say Walmart) negotiate a fixed fee for debit transactions (i.e. saving/chequing accounts) of like $0.15 per transaction. This is the reason they are so eager to give you extra cash back (act like an ATM) because it doesn’t cost them extra. For smaller retailers (like the corner store) they have a different fee, probably much higher, because their volume is so low. I don’t know if any debit transaction costs a percentage of the entire sale.
For Visa and Mastercard they have normal and premium cards, and they charge a percentage of the total sale. I once heard it was like like 2% for MC and 3% for Visa and 4% for Amex… but I suspect it again boils down to your size/volume of transactions. And the premium cards are a full percentage or more higher than the normal ones… which is the reason why some retailers have threatened to reject them. (Here in Canada Walmart was fully rejecting Visa for a period of time while they “negotiated” a better deal.)
Well, I finally got to use Samsung pay for the 1st time.
I get my groceries delivered, and everything else has been shipped to my door. So, I haven’t been an actual store in about 7 weeks.
But, there is a gas station by my condo that had a Samsung Pay sticker on the pump. I finally tried it - worked great 
Not many gas stations accept it, from what I have read.
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Welcome to the world of contactless payments
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The gas stations by my brother had contactless payments on the pumps. Wish the stations by me did.
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So few petrol stations here even have payment at pumps - some do, but I find their prices to be higher per litre. There’s a couple that have payment by app (BP and Caltex) that work well. Enter the pump number and confirm on app; your registered card gets charged.
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Well, the Valero right by me takes it.
But, when I was in San Antonio visiting my girlfriend last week - I went to 3 Valeros there, and not one of them took it.
On the one I did, I still had to enter my zip code on the pump keypad, just as if I had scanned the card manually. But, at least I didn’t have to mess with the card.
My problem is that my preferred card for gas doesn’t work with Google Pay. But the card itself is NFC enabled.
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S7 through S20 support it… S21 doesn’t for some reason. Probably wider acceptance of NSF payments and cost/space in the phone.