This will be the toehold DoJ and the FTC need to file antitrust charges against Apple, if it’s true that iAds cannot be blocked, and continue to be only acquirable through Apple’s process and not on the various ad exchanges.
I don't think Apple would be that dumb. Is iAd even available for websites? I doubt it. Also I doubt they even care about iAd, I imagine it's such a tiny part of their revenue.
The value of the feature to the alleged monopolist is irrelevant to the FTC/DOJ, solely the impact on competition. If the primary way consumers consume information is shifting to mobile, and the premier mobile platform inhibits mobile advertising except their its own built-in advertising system, then the FTC/DOJ can use that as the start of the investigation.
Given the speed DOJ and FTC move for monopoly investigations I doubt anything will happen before the market is already significantly changed and/or damaged.
