Well...ads in games like Splinter Cell and such would tend to make the game seem more realistic because that game does try to flesh out realistic scenes. Meat Farts' surprise as possibly seeing a Gaming Informer magazine in an ingame's character's apartment is kind of off beat, given that...well, I'm pretty sure there's a dude somewhere in real life who leaves his Gaming Informer on the table, just like that guy in Splinter Cell
I mean, I'm not quite sure what the surprise here is all about. Especially by Americans in your media soaked culture. We've seen advertising in movies for decades now, why when it shows up in what we play are we surprised?