| Steve Geddes |
It's not possible, according to Diego from Customer Service.
From a follow-up post from Sara Marie:
It sounds to me that they aren't set up to automotate this kind of thing.
Special Editions like this (coming out at the same time as regular editions) are rare enough events that it's probably not a cost effective feature to be adding to the subscription software.
Given the huge number of Starfinder subscriptions and the pace at which this limited edition is selling, I'm guessing that they just don't have the human resources to manually go through and make all the necessary changes this option would entail, given they'd be fighting against their own computer system (which would keep trying to give subscribers the regular version and/or deny them the Paizo Advantage and/or remove their Charter tag).