Facebook gives members one more reason to leave

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Mark Zuckerberg has handed users one more reason to quit Facebook. Newspaper reports that a UK political consultancy used millions of user profiles creates fresh risks at the social network he founded. People are already spending less time on Facebook. The danger is that members may unfriend it altogether.

Facebook lost more than $35 billion of its value on Monday after reports said that more than 50 million people had their personal data misappropriated by political consultancy Cambridge Analytica. The firm used the Facebook trove, obtained without authorization, to build a software program to influence voters, including in the 2016 U.S. presidential election, according to the New York Times and Observer of London.

The debacles may be taking a toll in other ways though. Zuckerberg said at his last quarterly earnings presentation that the aggregate time users spent on the social network was falling by 50 million hours every day. Advertisers often turn to how long people hang around as a sign of engagement.

And although the number of daily active users in the fourth quarter rose 14 percent year-over-year, to 1.4 billion globally, cracks are starting to appear in key markets. In the United States and Canada, members dipped by 1 million in the fourth quarter from the preceding three months, to 184 million, while in Europe member growth has slowed significantly. Those regions generated nearly 75 percent of the company’s fourth-quarter revenue.

Like MySpace before it, Facebook’s long-term dominance is by no means assured. New research from eMarketer estimates that Facebook’s share of the U.S. digital-ad market will slip slightly over the next two years as user growth slows and pricing for ads reaches its limits. The onslaught of privacy concerns – and the risk that it drives away users – may accelerate that decline.