Zynga down 5% after IPO debut…. Posted on December 16, 2011December 16, 2011 by Site Administrator Zynga down 5% after IPO debut. Anybody still think Facebook worth $100 billion? NOT!! To access this post, you must purchase The Credit Strategist Corporate Membership Subscription, The Credit Strategist Individual Membership Subscription, The Credit Strategist 1-Year Corporate Membership or The Credit Strategist 1-Year Individual Membership. Posted in The Credit Strategist.