Facebook makes a big change. Walmart boosts pay and closes some Sam’s Club stores. And Activision Blizzard bumps up its game. Plus, best-selling author Dan Pink talks about his new book, When: The Scientific Secrets of Perfect Timing.  Thanks to Casper for supporting The Motley Fool. Save $50 on a mattress at http://www.casper.com/fool (promo code “Fool”).