Comment by fransje26

> the French CB network is 0,17 €.

No, that's not right. The CB interchange fees are 0.2% + 0.0011€ network fee.

Therefore for 1€ : 0.002 + 0.0011 = 0.0031€, not 0.23€

So you have 0.2269€ of fees coming out of left field, with someone else making a massive profit.