Lifetime, apparently ;)
In all seriousness, it is amazing the amount of power that fans can wield - going back a few years another Canadian show called Due South got cancelled after a season. Fan pressure brought it back. It got canned again following that season. The fans campaigned again and got a third season.
So fingers crossed and keep the Blood Ties flag flying and hopefully some other network will see the quality of this show and let us, in the best 'Oliver' tradition, have some more.