Don't you think they could have brought in new actors and kept going? They cancelled it because it got shitty ratings and didn't fit their new strategy of using international financing to try to compete with HBO and Showtime without needing to front all the money themselves. Party Down
is a comedy and comedies don't travel very well overseas.
At any rate, the reasons don't matter. The fact that they show nothing I want to watch is what matters. Therefore, they are worthless. And also assholes for trying to get Netflix to drive up costs.