There is a scam floating around the web offering a free Subway gift card for just clicking on a 'Like' Facebook button. We just verified with Subway that is is in deed a scam and is not affiliated with Subway by any means. The URL for the fake site is: http://www.footlongspromotion.com/
Do not click on these buttons as it's likely the scammer would get your Facebook password. If you have clicked on these links, change your password right away!