If you choose any of the COLLECTOR'S supporter levels, you will receive a numbered special collector's edition of Escape, signed by the designer and featuring gold foiling on the box. Bling!
I just received the Collector's edition and the only thing I see so far is the gold foil on the box. No signatures that I can find....
Maybe it is just the KS ones that have the signature?
Edit: And there are six rulebooks (6 languages).