Yes, you are right - everyone can get their funds back so long as they know who to contact, they contact them within a certain amount of time, etc. What about those who forgot about the handful of BTC they left on instawallet, and stumble across their address 3 months from now? Sure, you could say they deserved to lose it, but that doesn't change the fact that there IS incentive for jav to shut it down.
My interpretation is that the
service is closing down when most funds have been withdrawn. I would certainly expect a static page with contact information to be there for
at least 3 months. I do not think that people deserve to lose their money for not visiting the site for 3 months.
But even if I had the money, it'd be hard for me to cough up the asking price for a site that doesn't have any method of generating revenue.
If the site has a lot of users I'm sure there are ways to generate revenue.