I think it will do alright at first but die off quick. I mean so many people paid for gore and now look at it. If I pay for a game I am going to play the hell out of it. I think Joel will get enough money to make Gore II but he has to do it fast before the next gen engines come out but I think most people will be like that is a doom 3 rip off.
As for in game ads I played Battlefield 2142 for over a month until I even noticed one ad and that was because I read so much shit on it. I think it is a bad deal for the people who advertise. After I look around at the cool levels for a week I forget about everything and focus on killing people. I think too many people are getting bent out of shape.