Restaurant.com certificates are really just a coupon, not a regular gift card.
Each restaurant and each amount have different rules and regulations.
Once you select a restaurant, highlight the circle next to each amount to read what goes along with it. For instance, a $25 cert may say you have to spend $35....but the $100 cert may say you have to spend $200.
Some restaurants only include food, have certain times and/or days that it can be used.
In Orlando, we used a $100 BB King. We had to spend $200. They did allow alcohol to be included. The food was good and it was worth it. I only paid 7.00 for it with a code.
Always look for a code...restaurant.com often puts them on sale. So don't pay the full $10 for a $25 cert if you don't have to!