PART 2 - FOUR HIDDEN CHIMNEYS CHAPTER 8: THE SHIELD OF SCREWTAPE Three Sleepy Kings

"In 2013, Flurry estimated Facebook at 18 percent of U.S. smartphone and tablet time versus 20 percent for all mobile web browsers."

The primary mobile-usage data support Madrigal and Dixon's description that Facebook consumed about as much mobile time as the rest of the open web, while defining the measured universe precisely.

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