Be aware of a fake Walmart gift card scam that is going around on Facebook.
Part of the issue with these “Give Away” sponsor offers is that the consumer is often in for a lot of grief, usually in the form of loads of spam coming into your email box and tons of telemarketers calling your home all with a special deal. 
There have been some that had Identity theft as a Christmas Season Gift.
Along with Phishing scams, where the victim ends up loosing a lot more than the promise of a free gift. Usually if it sounds too good to be true then it probably is.
If you signed up for this Facebook promotion, don’t feel too bad, thousands of others have as well, it can be tempting to take a chance on “winning” but the reality is that usually you have to sign up for a credit card offer, along with other offers that will cost you money.
(Even if you satisfy all the many offers they will throw at you)
You may never get a card, a lot of those that have been scammed report emailing these sponsor offer companies and being told that the card was in the mail when the truth was they would never get a gift card at all.
So be aware of these companies that use a bait and switch scam to get your user information as well as the information of your friends on Facebook.