At that point door dash still thinks the pizza will cost much less, so if it's only the total the customer paid that's authorized, then how does the full cost of the order get paid?
Since this was part of a “demand test” door dash is more interested in capturing a large number of orders than per order profitability. Once their digital marketing muscle has doordash originating 10%+ of orders to the restaurant they have the leverage to negotiate a per order fee from the restaurant along with an agreement to force the restaurant to manage their prices on door dash, shifting liability to the restaurant for incorrect pricing online.
How would they know what percentage of orders isc coming through them?
Yes, this causes a significant amount of driver support issues where they have to live chat in because their red card is declining.
The driver is instructed to not give the restaurant receipt to the diner.