They dropped it because the ratings sucked. And probably the DVD sales weren’t very good. Bad ratings can be forgiven if the DVD sells well, but bad ratings and bad sales will kill it quick. It’s too bad, it was a good show, but from the first frames it had no mass appeal.
Well, I for one, didn't watch it because I was just coming off of a long stint of watching BSG jumping a light-year-long shark, and had a pretty bad taste in my mouth for the entire franchise.
I suppose it could end up being one of those shows (like Firefly) that I finally watch on DVD and kick myself for not supporting while it was still on.
My comment was more a rant against SyFy than against the show, itself.