I don't see how this is any different than any predecessor title essentially paying for it's sequel. Is it a special case just because of the Prologue name? I see this the same as Assassin's Creed paying for Assassin's Creed II, Resistance: Fall of Man paying for Resistance 2. Gran Turismo 5 Prologue is essentially the title that ate the costs for developing the engine and a lot of major costs, and it's pseudo sequel Gran Turismo 5 is the one that reaps the benefits. Really the money from any of these games could be redistributed anywhere the publisher wants, so this is a pretty common occurrence. Don't let the oddity of it being a "Prologue" confuse the very simple situation at hand.