The common excuse is licensing and copyright. Yet none of these services are actively trying to fix it. They just do not care about non-Americans.
Many other American companies make excuses too. Apparently non-American money is no good. Heck, Microsoft have differing support services. They even actively try and hide the contact information. When you find you figure out quickly they ignore your contact requests. Unless you mention bomb, gun or addresses of their employees families. Oh the creepy things you have to do to get them to do their job. It is vile nasty work indeed.