Restaurant.com has been doing this promotion for a while now (changing the promotion code every so often), and although there are a few catches, it’s still a pretty phenomenal deal.
There are hundreds of restaurants to choose from, but keep in mind that each restaurant has its own specific restrictions. Some require a minimum spend of anywhere from $30 to $75 (many of which do not include alcohol), others honor these gift certificates Monday through Thursday only, etc. As long as you’re OK with what’s in the fine print, you can’t beat getting a $25 gift certificate for two bucks.
The gift certificate are valid within a year of the purchase date. Enjoy!