Facebooks security systems arent currently blocking it which is making it easy for scammers to earn a crust. The bogus Pizza Hut offer messages look like this:Eat for Free at Pizza Hut! The scam is just the latest scam spreading on the site close on the heels of similar campaigns claiming to offer a free coffee at Starbucks and Tim Horton’s. Similar campaigns have also been posted on the social networking site that claim you can eat for free at Starbucks or McDonald’s.”]
Source: https://grahamcluley.com/eat-for-free-at-pizza-hut-its-a-facebook-scam/