A box sale != A CD Key activation

A CD Key activation != +1 concurrency 24/7

1,000,000 boxes sold != 1,000,000 concurrency at any one point in time

Sales forecasts and figures alone aren't reliable indicators of peak concurrency. There are a myriad of other factors.

Really as someone who's worked with MMOs for the past 6 years I could go into a lot more detail about this but I get the feeling it'd just be a fruitless endeavour.

We can't login, it sucks balls and made me very sad last night when I couldn't play. But, they're working on it to the best of their ability. Not really much more that can be done beyond that and no end of bashing Square Enix on an internet forum will get things fixed any faster than they possibly can be fixed.