Prediction: 90% of respondants will react to the concept of in-game ads as if someone was offering to attach live leeches to their eyeballs. Brave proclomations will be made about how respondant will never, ever, EVER pay for a game that has in-game advertising, no matter what.

Prediction: If the game is good, same people will buy it and play it, complaining bitterly the whole time. Until and unless the advertisments get so intrusive that they actually interfere with gameplay, people will put up with them to get their gaming fix.