You're adding something that isn't a part of this:you can monetize it.. if you have SC01 - transferrable FUSC.. "sell" current car to buyer, the buyer accepts the SC01 car on their app/Tesla account. This new owner then purchases their new vehicle and transfers FUSC over to it (now the new Tesla has SC05 - non transferrable). The buyer then transfers the original Tesla back to the original owner
This transfer thing doesn't have to sell or move the original car itself. It is just buying the new car, and then effectively sucking the Supercharger status off of the old one. But the old car can still be kept, used, or sold only if you feel like it, but isn't required."sell" current car to buyer,
So if you had one Tesla and just wanted to buy a second one, but preferred to have the unlimited Supercharging on the new extra car, that could be a use for that.