As one of my friends and some people in this forum have said: Amex is a dying card here in Finland. They also have stopped offering some hotel gold cards including Marriott and Shangri-La. Hilton gold card is not that good anymore because Hilton hotels don't honor it that well anymore. Or that is what I have experienced. They are not willing to give good upgrades anymore and most of the time you have to beg for it in the reception.

I didn't know that Power doesn't accept Amex anymore. Also eBay is ditching Amex in autumn which I think is a huge hit for Amex internationally. I think Finnair Visa is one of the best card in Finland at the moment. At least it's accepted everywhere.