At  April 14th 2013 a post in Official forum of SimCity Social confirms:

Simcity Social will be shutting down on June 14th.Edit

Simcity Social Posted on thier App page on Facebook: "The decision to retire older EA games is never an easy one to make but in order to re-allocate servers and resources to more popular titles we are removing SimCity Social from Facebook. Players who still have a balance of in-game currency are encouraged to spend it before the game is shut down on 14th June and is no longer available for play."

The End

SimCity Social is shutting down on June 14th
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