i am currently in the beta Phase 3, however please see below.

i was a 1.0 Player, i was a part of the 1.0 beta, quit the game, and reactivated my account just after the legacy cutoff, and remained active until shutdown.

i did my initial registration on my business email, which is very similar to my SEM email, and realized after the fact that the email i had used was not my SEM email, and figured it would cause problems, so i went back and applied under my SEM email as well.

i received an invite Saturday morning on my ALTERNATE email.
i still have not received an invite for my SEM email.

i don't need an additional key, i have no use for another.i'm just looking to solve the issue for others
hope this helps.