Apparently, there are some free limited items on The Sims Social which you can claim directly. This could be due to some bugs but while they are still available you may claim them using the following links. Once you claim them, please look under the STORAGE of your SHOP. Please bear in mind this is NOT an official giveaway from The Sims Social, so please use them wisely.
Bonus: the Sims Social Special Limited Edition Poster