Not necessarily free but I eat at subway regularly and $5 for a $10 giftcard sounds worth it to me. They give you a $10 credit once you sign up but there is hardly ever deals that let you use it
. Anyways, This is my first purchase from them and I just bought the CVS and Subway giftcard. I was told it was legit by people who have used this site and it has been featured on many public mediums.