And just what will those users buy? The Samsung-S7 (and equivalents) will buy a similarly priced iPhone. The rest have no alternative. BlackBerry is down and out. Windows Phone essentially is too. The only remaining players are iOS (at 10% of the market and 90% of the profit) and Android (with the rest).
That's my point. Google would never use their control of Android to serve their own AdWords or AdSense ads on Facebook on mobile, because the loss of Facebook would push the Android segment that makes them money (the higher end segment) towards iOS
