Amazon is sending out targeted offers giving folks 3 free months of Amazon Prime membership. Although everyone is receiving free shipping through November 22nd, even non-Prime members, there are still some useful benefits of having the membership. And if it is free, why not!
Many folks have reported receiving an email offering them this 3 free month membership. However, you can always check to see if you are eligible by signing into your Amazon account and seeing it the promotion works for you here.
Also, for those of you tracking all the Amazon Black Friday promotions, here is a running list of all the deals.