No, you get it via email and you print it up and take it with you. Yes the website is 100% legit, I use 2-3 restaurant.com coupons each month. They are not actual gift cards, they are more like coupons so that's what I tend to call them. Go to the site and review it, see if there's anything you might want to try, make sure you ready the fine print as there are rules to buying the coupons and you need to make sure you know what you're buying before you complete the deal.
Are you entering the PROMO code of PLATE where it says to? The code is still good so it should still work.