As I understand, C-Cex seem to be "one man show", so when owner goes on vacation, exchange doesn't work.
I really don't see reason why would anyone use it.
I would add it's more on "vacation" mode than working normally. BTW, last year BTCZ community had to pay 4 BTC to person (I wouldn't name it) which self-initiatively paid C-Cex for listing while many were against listing there. We see now those BTC's were spent unwisely ...