(This is something that happens for me regularly -- I "discover" something only by its shutdown notice making the HN front page...).
Whenever stuff like this happens, I always wonder how many people, like me, hadn't heard of some service or product, and I wonder how many of them would have used it if they had. Would it have been enough to save the company from going under? Was it a marketing problem? I dunno, that's just the kind of strange places my mind tends to encounter in its errings.