This is legally not a scam but it is worthless. I purchased certificates to cash my expiring frequent flyer mileage. That was almost two years ago. I used only one of the certificates so far. Even though I had numerous certificates for the same restaurant they accepted only one per table even on a high bill. The number of the participating restaurants is very low and many of them discontinued the relationship with Restaurant.com. I received emails to change the affected certificates but I was unable to do so because I did not find any restaurant I liked close by.