Subway’s free sandwich is a great marketing campaign that will produce long term revenue that offset the cost of the promotion . For many previous customers who haven’t gone to Subway in awhile will return and order that extra sandwich. It also comes out an auspicious time since “Chipotle” it’s main competitor is suffering from an E Coli scare The deal requires you to buy one sandwich of equal or greater value to get the free sandwich and by the time you add your soda’s and snacks to the meal Subway will be probably be ahead or close too it. Not only does this deal increase the amount that a regular customer might buy but also invites potentially new customers to the franchise as friends bring friends to the chain. To conclude giving a sandwich for free can work out to be more bread for the business in the long run.