I also received part payment yesterday (they still owe me more). I really do hope they survive.
It's such a nice site, and tightly edited collection (and yes uploads and everything else works fine for me).
Other than having very high standards, and putting current payment problems aside I don't really see what crestock has done wrong? Especially when compared to certain other bigger agencies who threat their photographers like something they trod on and stuck to the bottom of their shoe.