Bubbles are in Nature. My opinion on these barely acceptables extremes is clear.

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Zynga is a Multilevel-In-Disguise-business.
A negative business : consider social costs in terms of useless  HOURS spent by the "Zyuga fans" , the mass is hardly believable. But true.

On top of that add the mimetism which will induce young and not young to non "proper" behaviors.

The business model is  null since - as said- is a sort of multilevel.
Many  contributes with little and - in a "viral" "Phi"- involve others in a  sort of new customers referral.
For FREE :  the total vantage from the  Zynga side,  corresponds zero benefit for the customer.


Enjoy  

http://knowledge.wharton.upenn.edu/audio/110414_Tech_Bubble.mp3