Well, with all due respect to the hard work they put into the project it's kinda lame to shut it down like this.
Even if they are not going to work on it ever again, leaving it accessible in its latest state, especially for the people who bought it, or even giving it up to the community for pickup would've been a much better and much more trusted choice.
Well, who am I to judge though, it's up to them. I'll just be sure to never get involved with anything they do in the future.