I guess the dev finally called it a day after years behind the project which actually didn't produced much. This is one of the old coins that was created just few years after bitcoin's birth. Volume is very poor and close to dying too.
It's very similar to the html coin which has created after bitcoin was born. It's dying and almost dead. People should move to the a new promising altcoin and try to forget the old one if that was a useless coin. I will prefer to leave quark as fast as possible.