So are Melissa McBride and Scott Wilson main cast or what? It has been announced that they are, just publicized less than the other three. But we should put it to a vote.
Also, (@Lethal) if they are paid as main cast, they should still be considered main cast. After the opening credits, it says "also starring", not "Recurring cast", therefor it is more broad and can also refer to those that are in the main cast.