> but not how they lose money on rural deliveries It's part of the USPS pricing structure that the dense urban environments subsidize the sparse rural ones. I

> but not how they lose money on rural deliveries It's part of the USPS pricing structure that the dense urban environments subsidize the sparse rural ones. It's not a question of "just one more package" being basically zero cost. In the aggregate there is incremental cost to delivering more packages, and that cost is higher for rural packages than urban packages. Apparently, the rate structure just assumes a certain urban/rural mix without accounting for a trillion dollar company with enough capital to arbitrage the lower urban delivery cost.