Facebook advertising is pretty useful, and if you're a company that can offer something to your Facebook fans, it is even more useful and not to mention, beneficial. Chick-fil-A got some buzz this week for offering free samples through Facebook. The ad offered a voucher for a free breakfast biscuit, and all you had to do was fill out your mailing address. The information that Chick-fil-A gets goes only to them, and not Facebook. Once you filled out your mailing address, you can even allow friends to see you got a free sample voucher, which spreads the word.
I think this type of Facebook ad is great, and you really can't go wrong with giving free samples. It does benefit to become fans of your favorite brands because you never know when they'll start giving free stuff!