Dominos can do it for Pizzas because the profit margin on Pizzas is about as close to 100% as you can get, and delivery-person pay is about as low as you can ge

Dominos can do it for Pizzas because the profit margin on Pizzas is about as close to 100% as you can get, and delivery-person pay is about as low as you can get, combined with subsidy via tips. A $20 pizza will have a higher total gross margin than a $100 anything-retail. Amazon is going to lose money on this, and it will probably only ever be feasible (even as a net loss) in a handful of zip codes in the US.