You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract In Gnip Buy, Twitter Grabs Control of Key Data Middleman The Acquisition is Yet Another Indicator of the Value Corporations and Investors See in Social Data By Kate Kaye, Published on April 15, 2014 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.