This sucks for us and our community, but let's remember that the staff and their families are going to be without a job very soon.
I for one would be happy to have TS not issue me a credit and give it to the staff to help them get by.
Players have to *manually* click and select option 3 in their own special refund page here:
http://www.glitch.com/closing/refunds/
(by default, it's set to automatically refund pretty much everything, including older payments from a year or so ago)
The deadline to make this choice is Nov 30th, 2012.
"I already got what I paid for and would like Tiny Speck to keep the proceeds. If you are satisfied with your purchase despite the closure of the game, we appreciate you supporting us through this option. We are providing generous severance pay and are committed to helping find new employment for all 35 employees and contractors who were aid off as a result of Glitch's closure"
(edit, thanks Maruchan for the suggestion)