When I first heard it I personally thought it to be a blessing for those with outstanding mortgages. Then when I heard the last part of implementing an open ended mortgage payment I thought twice and didn't agree with it.
After giving it some serious thought, I figured out it was a calculated well thought out move by the org knowing they would come into some serious dough. They knew how many outstanding mortgages there was and probably how much money congregations had in their savings. In the end, they knew approximately how much they would gain, especially with the open-ended note.
They, as in the GB, are stupid men who wouldn't know business even if a stock option certificate was shoved up their ass, instead they rely on shrewd business consultants to steer the org's finances in the best way possible.