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 Internet Ad Revenue Hits $8.4 Billion in 1st Quarter Increased Spending on Social Media, Online Video and Mobile Likely Contributed to Growth. By Jason Del Rey, Published on June 11, 2012 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.