The deal was 3 consecutive months before the end of September.
that wasn't the deal. on the lodestone, it says i need to have paid for 90 cumulative (not consecutive) days before the 2.0 open beta begins, which i did. i paid for a total of 90 days, and the open beta hasn't started yet, therefore i should still qualify. also, that article you cited says:
You need to have at least three months of subscribed and paid time on your account before the end of September 2012.
which means that if i subscribed for my third month today, i would still qualify. my subscription time would run out at the beginning of september, not the end. you had to prepay for 3 months before the end of june only if you registered the game in may.