Caution. Don't buy it. You will just be wasting your points.
First of all you can't get into DiscountDiningDollars.com until you have purchased the prize. Once you get the code, the best you will get from the restaurants are buy one get one (BOGO) free. That's not a reward, much less a prize. It's a coupon. A coupon you can get from your community paper. Plus on top of that you have to start purchasing the BOGO within 30 days and the offers expire in 1 year.
So buyers beware!
If I get a chance, I will post a screenshot of inside DDD, as described above, since DDD does not let you see the offers until you have made the purchase. I don't know if I can insert images on the reply or edit mode.
UPDATE: Thanks all for inspiring me to post a screenshot of inside DiscountDiningDollars. As you can see, there's no good deal there. At best it's a BOGO at Taco Bell, at worst it's $5 off a $25 purchase at Friendly's. I'm glad I'm not the only one who thinks this is a ripoff.