I think the way to go for you guys is each person apply them to their own ffxiv service account. For exampe: ffxiv 1 , ffxiv 2 , ffxiv 3 and so forth. I have 4 different ones on my account and we did not all preorder. However we are all legacy so it does not matter. But, I did preorder because I wanted the physical items. PS3 btw. So today I added that to my account. I will get the items on ffixiv 1 and the others in my house will just get EA. If say I had another preorder code and applied it to ffixv2 than they would get items too. We all play at the same time and that works fine. The main thing that link is trying to point out; you can only login to a specific platform one at a time. So if you logged into pc than you could not login to another pc or a ps3 without dropping your login on that one pc. However if someone else logs in on ffxiv2 than your golden, no problems there. I hope that helped clear things up.