Internet

Facebook's influencers nod shows murky side of campaign ads

Facebook's green light for political campaigns to pay prominent social media users to spread their messages is highlighting the difficulties around setting rules for the fast-changing world of online political campaigning.

Internet

Twitter surges as global user growth revives

Twitter shares jumped Thursday after an update showing it added millions of new users and boosted ad revenue in the fourth quarter, sparking optimism over its growth prospects.

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