As far as I am concerned, the code is a "win-win" situation. Disney makes money and the traveler gets a deal. Everyone is happy.
I am reading a book about the ski industry and all the things they do to capture the vacation dollar. They literally plan where every shop is placed when the build and create a new base area. For example, they will position a candy shop so that people of certain demographics pass by it at certain times of day. They actually know what position the sun will be at various times of day and how that will capture and backlight the candy making process and display the product. They even audition shop owners so that the appropriate proprieter runs the shop.
The ski industry actually learns a lot of their tips from Disney. They are masters at creating an "experience". They are also masters at marketing and producing deals that are profitable. One a traveler gets one of these deals they feel great because they had "saved" $. Ultimately that savings translates into spending (upgrading room, adding premium ticket, spending more on soveniors and dining).
The bottom line is I think Disney is a good value for the vacation dollar. It's a better value when you score a deal!