Apart from Amex, which cards you use that is not compatible with Curve?

Diner’s Club would be great.

Diners Club! Support for this would be great!

I’m from Poland so any card that give me possibility to use GooglePay and GarminPay.
I’m loosing hope that Curve ever offer this service for Polish clients…

I use a UnionPay card from China and a Visa Plus from HK.

Diners Club

Just my Maestro card linked to my main bank account

Yes, do not forget the Diners.