Facecrooks security provides an awareness of fake “Facebook Offer” pages designed to collect email and other senstive information.  These ressemble legitmate advertising offers and the article shares ways to better affirm whether they are valid or not.  

How Scammers Can Use a Bogus ‘Facebook Offer’ to Obtain Your Email Address

QUOTE: Recently, Facebook introduced ‘Facebook Offers’ for page owners. This allows businesses to create special offers and then post them to their Facebook page. All users have to do is click ‘Get Offer,’ and they will be emailed the details on how to claim it.  One thing you should be aware of is that as soon as you click the ‘Get Offer’ link, your name and email address is immediately shared with the Facebook page conducting the offer. Personally, I think it would be better if you received a notification that your information is going to be shared, and then given the option to proceed.