I been confused. I also got the Physical CE but there are 2 code in there. 1 is 6-3-6-3 another is 4-4-4-4-4. I'm pretty sure that 6-3-6-3 should be the Early Access code...maybe and 4-4-4-4-4 should be the Subscription code.
Funny things is that 6-3-6-3 code paper said go to the http://member.eu.square-enix.com but it send me to Final Fantasy 7 webpage. LOL