..and I found on some american companies, with offices & sale in Europe the VAT Numbers (Apple, IBM, Oracle, McDonalds, BurgerKing, Garmin, Chevrolet)in the imprint
After reading this thread and the german thread, I can't believe what is official written. I guess, that GS want to make an easy price system.
If the tax thing is real, I would advise GS to take a specialist for european tax rules and websites rules. Otherwise GS get problems in the future if a creative lawyer find it out and sent GS an expensive warning.