I did Weight Watchers years ago and there was a plan that some people were doing called the Wendie Plan (not part of any official WW plan, just something a member named Wendie made up many, many years ago and word got around and others tried it). The plan cycled the calorie intake throughout the week and still to this day, if you go on a Weight Watchers forum and somebody has hit a plateau, someone will suggest they try the Wendie Plan to break their plateau.
I think it could be great for someone with great willpower. I would be afraid that my high calorie days could derail me.
M 2 cents