You got to put that deposit when it comes time for the reservation and make sure to get it in writing as well just to make sure. This is the only way to get your latest vehicle build to spec without having the dealership charging you them mark up prices. You will pay msrp though.
Ford folks already told their customers to report cheating dealership so they will be put on a ban list. No more ford sending to that stealership.
Now if they want a vehicle just to put a mark up pricing on it, they will try to get you, the buyer to cancel your reservation by lying to you during transit. So now your ordered vehicle will get ship to the stealersihp for a markup and there will be someone out there with money will pay for it.
Still falls back to supply and demand. Blame on the rich folks who has the money and who doesn't play the the waiting game or discount game when it comes to car buying.