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 Pandora Surges in First Day of Trading, but Faces Apple, Amazon and Google Next Annual Loss Shrank to $1.8 million Last Year as Registered Users Topped 90 Million , Published on June 15, 2011 1 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. Register Now Already a member? Log in.