I have my doubts on whether they'll patch the Willys itself, considering there was, IIRC, a similar thing with a Porsche in FH4, but yeah, it is an absolute piss-easy way of getting money, and with the potential of removing them from your garage and getting refunds, it's basically going to set me for the rest of the game's life if I do it hard again before it gets patched in any way. I'll have to test to see if the refunds are just a one time thing, or if they can be replicated, because a friend of mine in a Discord server I'm in was doing this grinding strat hard before I did, and he literally logged onto Forza after I posted that screenshot, and he didn't get a refund from doing more or less the same thing I did.
I do have to admit, the grind is made better by the fact that drifting is actually fun now and has some visceral reactions with the new tire and smoke effects. Hell, I've probably had the most amount of fun drifting in this game since I did playing the original GRID.