There are ways Disney could use this to help with availability concerns, for those that don't know, when you book a cruise, here is what happens on the backend:
You book a room with points, that room with that many people is worth $xxxx, so Disney will take a
DVC room from inventory and rent it out for cash for a similar dollar value and then they pay the cruise line on your behalf with that money.
What I think Disney could do, if they so choose is to essentially take that dollar amount from the marketing budget to pay the cruise line and not take a room out of inventory, which would then help address the availability concerns while still keeping everything within the legal limitations.
Additionally, since this isn't a "member cruise", but technically a "chartered cruise", which is a private cruise that DVC members are allowed to take, there may be different rules at play here that allow them to get more creative and if successful at getting rid of some excess points, I think they may even do a few more of these types of cruises to help.