"I know he gets money off of advertising, but those ads would be there whether I went on myspace or not."

Well, I would guess that how much he can charge for those ads in some part depends on how many MySpace members view those ads embedded in their homepages or whatever. (As I said, I don't do MySpace.) I'm not in advertising either, but online ads prices are often based on traffic, aren't they? So if you're going to MySpace, and seeing those ads (for anything), you're helping Murdoch make more money. But like everything, there's a cost/benefit ratio to consider. For many (most), giving up their MySpace account would be far costlier than adding a few pennies (?dollars) to Murdoch's pile.

Of course if I'm wrong on any of this, I'll be happy to be enlightened.