Then we just agree to disagree. We have to both concede that neither of us knows, nor will we ever know, What DVC's intentions were with respect to banking and borrowing when the rule was put in place.
My belief is that is was so members could save during the rainy season and borrow during the sunny season.
I don't believe the system was ever put in place with the expressed intention of affording someone the opportunity to buy 1/3 of a year's points to bank and borrow to use exactly that number of points every 3 years. Sorry. I just don't buy it. Can it be used that way? Certainly. But when it doesn't work anymore, I think it's safe to say that wasn't what DVC designed it into the system for but that's just my opinion.
I don't think any of us can presume to know WHY DVC did this - I choose to believe it's to "inflate" the older resorts points to come in line with current resorts for sale and to discourage competition from the rental market. That's my opinion - not 50 point b&b'ers "destroying" the system.
But of course - all we're being told is "To enhance the system for members"