[BrandoElFollito]

The rule is always "pay with local currency"

We have the same thing in Euroland

[stavros]

Here in Greece it always asks "Euro or USD?". Most merchants know to press Euro, the rest ask me. I think I've maybe had one merchant press USD by accident in ten years or so.

[account42]

Exactly, who has more incentive to rip you off, your bank or some random merchant/payment processor/local bank that you are probably never going to interact with again either way.