I was thinking of this in a totally different way tha others have. Disney requires a one night payment for stays, and this is stays well in advance also. If you stay 2 nights you pay one in advance, if you stay 8 nights you only pay one in advance. Yet Disney sells out most rooms three months in advance depending on season. And with room only they only way I do it, you have up till five days to cancel. I am going to assume that if someone cancel 5 days in advance Disney has less change of selling those 8 days. In comes a new system, a while ago, maybe 2 years.
Now every time I go I have to play around first with my resort part of my stay which unbelievably is harder than my DVC part of my stay. And no matter what for me, I can never find more than four nights at a time. So when we go in Jan I booked 4 nights POR and 4 nights POFQ, but in the beginning it was 4 nights Poly and 4 nights GF. No matter what I do it always comes out 4 nights, if I move to yacht I can get only 4 nights, if BWI all I can get is 4 nights.
So my thoughts are, it is a way for Disney to make a few more dollars on the people who cancel 5 days before, on room only. By booking just four nights at a time they get to collect twice you need to put two deposits. If you cancel they at least get two nights pay instead of one and they have a block of a few nights for those lucky few who want to come very last minute or who has to stay a little longer when they get there.
Just my thoughts anyway, but it does seem like a very strange way of doing business since it s a vacation resort and most people go on vacation from Friday night to Sunday night a week later, so 8 or 9 days. We always take the 9 pm flight out on Friday and get back with a 4 pm flight a week and two days later Etta get home at 9pm. Others may do Saturday morning to Sunday morning or Saturday but still you are talking 7 to 9 days so why will Disney only allow a4 day stay.