Thanks for the tip. European law is relevant in this case as well, and I'm not sure it requires a strict monopoly over the market. That said, clearly if iPhones were a small part of the mobile ad platforms, nobody would care if Apple limited the ads that could be shown on them. I don't think that's the case though.
The point I was trying to make was: If we switched this around, and Microsoft had the number one smartphone, and they did something like this, regulators (though you're right, probably not American ones) would have them bent over a table.
