After Trolling McDonald’s, Burger King’s App Was Downloaded 1 Million Times and Hit No. 1

Sometimes, trolling pays. Burger King got national attention this week for offering 1-cent Whoppers to those who drove up to a McDonald's location (and then, presumably, drove away to redeem their BK coupons). Key to the stunt was the brand's smartphone app, which unlocked the offer when it detected users approaching within 600 feet of...