You are vastly over-estimating the tech power the vast majority of businesses have dedicated to logistics. There's a large number of different systems involved with a enterprise logistics stack. Ecomm store provider, ERPs, middleware, warehouse systems, shipping systems, banking, etc. Which part of the pipeline are you going to hold up while you wait for enough orders to pool to build a meaningful heuristic?
The solution Valve came up with is quite brilliant.
The solution Valve came up with is quite brilliant.