An EZ Board post on the help board claims that they will honor the 6 months (if you paid for a year: oops...)
But they did pull another dirty trick: the 15th deadline is only for boards that are not yet part of the CSC program. If you had a Blue board and quickly tried to get another 6 months out of it: forget it. The Blue option was gone at least by the 14th (and the e-mails didn't go out until the 13th.)
And to buy into Gold through the chest thingy costs 50% more than what it should cost based on the rates and stats for my board.