The first buyer is DoorDash however, and if they somehow want to take vengeance on you after you managed draining their funds in an otherwise perfectly legal way, they might just use the non-fulfillment of their initial purchase contracts as a wedge to take you to court (of course this assumes they somehow learned about that detail of your plan). I don't know if they would have any luck with that, but it's easy to prevent this from happening by actually delivering something that's basically a minimally viable pizza.