Quote Originally Posted by Lindy
And as far as I can see, you can't get a US account from an EU code, yet you can get an EU code from a US account. How the hell does that make sense? People would be more likely to do the former rather than the latter.
Since WoW was released in the US far ahead of the EU, a good number of people from the EU bought a US copy and started playing in the US, then decided they'd be better playing on EU realms (lower latency, more players playing in your language if you're not English), which is why there is a possibility to "move back" from the US.