Facebook's (FB -1%) closely-scrutinized advertising ops receive new endorsements from Ford...

Facebook's (FB -1%) closely-scrutinized advertising ops receive new endorsements from Ford (previous) and Coca-Cola. Execs praise Facebook as an effective means of engaging with customers, though they say little about its ability to directly drive purchases. The comments arrive as Evercore's Ken Sena starts coverage with a Hold, expressing concerns about mobile payments, slowing PC usage growth, and a late August share lock-up expiration. (also)