The fees for those are still often comparatively lower to the US rates posted above. Credit cards are also not popular here, so while I do own one, I suspect average % of a merchant still remains low.
Amex also offers pretty good rates to low-volume merchants here to have more acceptance to my understanding.
The rates I posted are the full range. Because it varies yes.
You suspect average percentage is low but try to get a payment processor agreement and see within two years what you actually pay overall. It may get even above the rates I mentioned with fix costs the jeopardy to your business when a fraud does occur and the issuer blocks you from accepting any payment, or worse, accuses you of being the fraudster.
We are well educated by the financial system and VISA/Mastercard to believe this technology is for our own good. Many in the financial industry denounces their predatory practice, that of a cartel of 2 or 3 that imposed a dictate for decades. Things are finally changing, resistance will continue but you will see QR or some alternative will settle in.
The low fees are for debt and high for credit cards and VISA/MC won't allow you to accebt only the debt cards