True, and you left out a whole host of other issues. While EU regulations harmonize a lot, it's still much, much messier than in the US. * different tax regim

True, and you left out a whole host of other issues. While EU regulations harmonize a lot, it's still much, much messier than in the US. * different tax regimes * often quite different regulations * contract requirements * income levels which can affect pricing decisions / require regional pricing * localized ad campaigns per country * getting media attention in each country is hard * ...