I hesitated responding to this because it's requires some accounting-speak and we're going to put
@Krugerrand to sleep
. He probably opted to watch paint dry at this moment.
The Reddit post is partially correct.
When Tesla enters into an Operating Lease with a customer, they estimate what the value of that vehicle will be at the end of the lease (the residual value).
If the residual value of the car changes (in this case it goes up as used car prices are rising), then they take the benefit of this increase over the remaining term of the lease, they don't wait until the car returns to take the benefit. So there is a financial benefit but it occurs sooner than upon resale of the leased car.
The biggest aha for me from the Reddit post was the claim that Tesla adds FSD to these returning cars. I believe that Tesla recognizes 60% of FSD upon sale. 60% of 12k is $7.2k of pure profit per car. 5,000 cars coming off lease and sold with FSD would be $36m in pure profit for a quarter.
I know 100% uptake on resold leased vehicles is not likely - so the number would be somewhere below $36m.
But more and more leased vehicles are coming off lease each quarter and the number will grow.
This is something I have not considered in my financial models.