If you are saying they will make a decent profit, then you are saying they will be profitable. There is no "I never said they would be profitable." You are arguing with yourself.One penny gained is profitable. Decent profit means the money gained is satisfactory. Pretty big difference.
We know MS is publishing. What do publishers do?...so we know they are doing the advertising and distribution, that alone is a huge cost. We also know MS is helping to fund the development of the game. How much, who knows, but given how big this game was, and the fact that Square Enix were doing it already, I would assume MS had to part with some big bucks for this exclusivity.
Anyways, you need to show some sort of link or evidence to support your large, presumptuous claim that Microsoft is taking care of over half of the entire game's expenses.