Coase theorem says that shouldn't make a difference.
If domains have to be returned back to the registrar b) doesn't apply. Auctions ensure that a) doesn't apply either.
Furthermore, adding a 7 day waiting period before returned domains become available will further ensure that parties cannot trade domains between each other but must purchase from the registrar which makes owning a domain and squatting on it for purposes of selling it pointless.
People have crowdfunded worse things.