Comment by imtringued
3 hours ago
No, it has nothing to do with economies of scale.
Grains contain both starch and oil and when you mill the grains, the oil goes rancid much faster than the starch.
If you remove the oil you have a nutritionally worse product but it lasts longer on the shelves.
That does still sound related to economy of scale. Longer shelf life means you can have a larger inventory.