Aperture Science we do what we want because we can.
Its an inevitable truth. They will shove advertisements down our throat till the day we die. Anybody see the Futurama episode where Fry discovers that they broadcast advertisements in his dreams?
I understand the fact that that's going to happen. But to interrupt your single player game at any time to show you an advertisement for however long then resume after whatever important you might be doing. Then maybe but not likely they will put it in the multilayer game for the same thing. I think that's some BS.