The unnamed businessman's story has been detailed by content strategist Ranjan Roy, who explained that the restaurant owner was charged a figure that didn't correspond to his own pricing when he ordered it himself.
Oddly, DoorDash paid his restaurant the full $24 and only charged him $16 for the pizza.
Ranjan - who conducted an experiment of his own with the app and saw similar results - explained to the BBC: "We found out afterward that was all the result of a 'demand test' by DoorDash.
"They have a test period where they scrape the restaurant's website and don't charge any fees to anyone, so they can ideally go to the restaurant with positive order data to then get the restaurant signed on to the platform.
"Third-party delivery platforms, as they've been built, just seem like the wrong model, but instead of testing, failing, and evolving, they've been subsidised into market dominance.
"You have insanely large pools of capital creating an incredibly inefficient money-losing business model."