LinkedIn, Twitter Struggle as Second-Tier Social Media

Financial Times: LinkedIn, Twitter and Yelp each lost as much as a quarter of the value of their stock market capitalization in recent days after reporting that their respective advertising businesses were growing more slowly than expected. It is the latest sign of a split emerging between the strongest companies in the sector — Facebook and Google — and those that trail in their wake. These two companies are capturing the lion’s share of digital advertising dollars. “Advertisers are finding that Google and Facebook can be a one-stop shop.”