Third-party Hail Mary Zynga hopes to grow by allowing other game developers to leverage its network and release Zynga Partner games. Just as Zynga used Facebook's platform to reach users, Zynga hopes other developers will use its platform to reach mobile and Web users. The problem is, a developer could just use the already-in-place networks of Apple 's (Nasdaq: AAPL) App Store, Google 's (Nasdaq: GOOG) Play market, or Microsoft 's (Nasdaq: MSFT) Windows Phone Marketplace.