Have you noticed that all booking engines and hotels are now on the same page? Before booking engines use to display the lowest rates, then the Hotels go angry so they dropped their price offering you a better hotel discount hoping you would book direct with them. Not the booking engines are angry because they are loosing business. Now for the first time ever the hotels and the booking engines are selling the rooms for the same rate. This means hotels stop price competition and you simply have to pay the rate you see, unless you are members of Hotels Etc.
For more details :-http://www.hotelsetc.com/blog/no-hotel-price-competition