What’s an active social-media user worth? The surprising answer is: about $100, regardless of whether we’re talking about Twitter, Facebook and LinkedIn. Even though each company has a unique business model — and sharply different success so far at monetizing traffic — Wall Street treats them almost as triplets. In fact, Twitter’s devotees, who generate the least revenue, are currently deemed most valuable, at $110 apiece.
via A Twitter User Is Worth $110; Facebook’s $98; LinkedIn’s $93 – Forbes.