There was a notice ( last week I think) that said they're monitoring real time for server activity and lock / unlocking servers on either a 3 or 6 hour check based on usage. Every morning I've gotten up Ultros was unlocked, and when I get home it's locked again.
My friends and I decided to just wait till world transfer start, which is expected any day now at "mid September". We are all hopefully going to land on Ultros, right now I'm the only one there. I feel your pain :)
The Singularity is near.
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