They could also get rid of some of the reasons people need to rent out their points for, making it easier to use your own points now that they tamped down the transfers allowed. Maybe allow an exception for the banking of points past the end of the banking window for a cancelled reservation (outside of 30 days) once per year. No need to rent out the reservation last minute. Or allowing the return of borrowed points once per year as the result of a cancelled reservation.
They could let you "rent" some point back to Disney themselves like others mentioned other timeshares do at a reasonable rate, maybe just a bit below the cost ($20 currently) of one time use points. So maybe between $16-18 per point. Then Disney can sell them as OTUP (maybe increase the number of OTUPs allowed to buy as well) or rent them out as part of cash reservations. They make money either way. You don't have to make reservations under random people's names and be careful not to cancel them accidentally as the person renting the points. And the end user renting the reservation wouldn't have to worry about a member cancelling the reservation out from under them or getting scammed. They would be using the points themselves as OTUP or getting the Res directly from Disney.
They could probably bake it into some sort of swap program as well (so you won't have to pay taxes on it as rental) that puts it on a special
DVC debit/gift card that you can use for Disney stays, cruises, tickets, DVC direct contracts, etc. So they know they will get that money back from you anyway. Then put a limit on the percentage of points you are allowed to rent out on the private market. IF you have a need to get rid of even up to ALL your points for a year or two, then you have an easy way. And anyone else who tries to rent out privately too many points would be searching for too much profit and could be considered a possible commercial enterprise and warned, then punished if they do not comply with the rules. Everybody wins (except commercial renters)