It's always cheaper to purchase the broadcast rights in a market than it is to produce the show yourself. Let someone else pour the money into development and production, and you just pay a nice little per episode fee.
This seems to be Syfy's current strategy. They only announced one new series they are developing themselves, everything else they have on the horizon (scripted drama-wise) are international acquisitions.
Better that than more reality shows and wrestling. If they can find a way to put more actual SF/F shows on their network within the budgetary constraints they're under as a basic cable network in the modern media climate, I say more power to them.