Zynga (NASDAQ:ZNGA) and Facebook (NASDAQ:FB) rose to popularity together, but now one is crushing it in mobile while the other is getting crushed by mobile. The social network is proving that it can properly monetize its mobile user base, while Zynga is having trouble competing on mobile platforms. Zynga has also abandoned its plans to pursue real-money gambling, which would have been an extremely competitive sector in its own right. 

In the following video, Fool analysts Evan Niu, CFA, and Eric Bleeker, CFA, discuss Zynga's lackluster numbers and why investors should expect further downside from the social game maker.

The relevant segment can be found between 4:26 and 7:42.

Chris Hill has no position in any stocks mentioned. Eric Bleeker, CFA, has no position in any stocks mentioned. Fool contributor Evan Niu, CFA, has no position in any stocks mentioned. The Motley Fool recommends Facebook. The Motley Fool owns shares of Facebook. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.