I'm not so sure. You don't have to prove a monopoly. You have to show a selective targeting of a competitor. Manufacturer's using Google as a search engine allegedly have a different set of standards for their YouTube app than manufacturer's that don't use Google as search default. Whether or not that's how things actually transpired, it sure smells awfully fishy to an FTC regulator. This isn't about following rules or APIs, it's about provoking regulatory authorities to investigate Google so they maneuver more conservatively. And watch, now that Windows app will be approved post haste!