They linked the Square Enix Members accounts and SE accounts (were 2 different things for some reason. SE account had keychain number thingy, SE Members just had general info and groups and such on a page). Probably means that they are using the SE accounts you use to log in for the extra login in playonline if you have those keychain random number generator thingies...
Errr, security tokens.
At any rate, you won't receive any emails to the account you asked to get the newsletters on, but the account you are signed up for SE with.
Just to clerify. Check what email you signed up with here by logging in at: https://secure.square-enix.com/account/app/svc/Login?cont=account
Also, the priority was going to be people who have been playing ffxi, probably for more than 6 months like the mog bananza, over others first.
Also, this isn't the beta.
March 11th is the start of the late alpha phase test. People that received the email were invited to test the alpha, and continue testing when the beta starts.
Hope that answers your questions! you can get ahold of me on steam if you have something more specific to ask, I can probably answer it more clearly that way. http://steamcommunity.com/groups/FinalFantasyXIV? Edited, Mar 1st 2010 11:30am by MetalSmith