Good news and bad: The good news is that Restaurant.com is offering free $10 gift cards online. You can send up to 40 per day. The GCs often require a minimum spend, but they're great for restaurants that you would go to anyway.
Bad news: The site has been temperamental, to say the least. Just try occasionally through the day.
Note: It will ask you to import contacts from one of your email/social network accounts. You do not need to. Just type in an email address in the box below the request.