Restaurant.com: New 90% off Code ($25 Dining Certificates for $1)December 20, 2011 This post may contain a link to an affiliate. See my disclosure policy for more information. Restaurant.com has released a new coupon code! Through December 24th, you can use code JOY at checkout to get 90% off most Restaurant.com certificates. This makes a $25 certificate only $1!These are great ways to save on dining out, and would also make a great anniversary or birthday gift, or even a holiday gift!