Well it seems the Sims 3 site has listed a code on the Sims Social Redeem page for everyone to use and download the Sims Social Exclusive PC Content!
Head over to the Sims Social Redeem Page and enter the code you are given on the page.
Once you have redeemed the code, you will be greeted with a satisfactory code redeem message and then check your purhcase history for the #1 Fanatic Costume for PC!
♦ If you are having issues redeeming the code, change your language settings to English USA. ♦
Photos provided by swdknight!
Along with this exclusive PC Content, you will also receive Avatar & Game Badges for the Sims Social & a Sticker for your My Page.