As an American fan all I can point to is when the NFL plays in London and Mexico City, you're robbing a team of a home game, you're robbing season ticket holders of a home game, and you're robbing the fans of a home game. It's a dream of mine to travel to London and watch Spurs play AT HOME, not to watch some cheapened version of PL football in a random MLS stadium. I wouldn't be opposed to an "Audi Cup" type tournament (pre-season obviously), but anything more would cheapen the experience to the point where any real fan would be dissapointed. Then again what the fans want doesn't seem to matter much anymore.