Facebook has decided to phase out Facebook Credits and have users directly buy in-game currency with local currency. For those who also play other games no Facebook, you may have noticed some of them have switched to purchasing with local currency.
In compliance with Facebook's transition, we are planning to transition to local currency payments by end of July. If you have any unspent Facebook Credits balance that you would like to convert to Dream World Gems or Time World Gold, please do so soon.