> Switzerland has interchange fees of 0.4% for consumer credit cards

Only since Wednesday of this week due to COMCO action, so no-one knows if cashback will persist, but it will be a lot less than .33%.

> And let's not forget that cash acceptance costs an order of magnitude more than this anyway;

In the EU, it's .5% for cash vs .3% for cards, but the situation falls back into favour for cash once fraud is accounted for.

> Only since Wednesday of this week due to COMCO action

That Visa fee table is dated July 2023?