50% discount coupon for Pizza Hut using restaurant.com?

I tried using coupon cabin’s 50% off deal for restaurant.com to get a 50% off discount coupon for Pizza Hut. However, once I got to restaurant.com, I could not find Pizza Hut as one of the restaurants to choose from. Everybody keeps on talking about how restaurant.com will send you the e-coupon for Pizza Hut for $1.50 charge. How do I get the coupon? Can someone send me step by step instructions to get the coupon? Thanks a bunch!