Zynga’s headaches – did we not see this coming?

"As Zynga's stock plummets and analysts arrive late to the conclusion that the social game giant's Facebook business — 80 percent of its bookings — is in decline, we're faced with a lot of questions. What can the company do now? What implications will this highly-visible nosedive have on other social investments, and on the landscape at large?

"Also, how did anyone who's played a Zynga game on Facebook not see this coming?" writes Gamasutra.