NMH 2 is a great game, is a quality title with great production values.Ads sure helped Madworld sell faster than NMH1.You can and should market games like NMH2 just to let people know it already is out.
My guess is that ubisoft is hoping players the spread the word themselves.Basically they want NMH2 to sell over months, rather than quickly(is cheaper for them).But is risky, some retailers might bargain it. Many fans of NMH2 consider it big enough for them to expect TV ads to let them know its out.Is not a wiiware title, is kinda semi big. So when they dont see the ads, they asume is not out and dont go buy it.They are fans but they arent hunting the webs daily to see if its out or not, you see?