Well, customer desides and 100 % clean is bought by the ones who value 100 % clean, simple to me. Actually the "20 ppm Mills" make good markets to "100 % clean product". Quality pays. To think about the price, as a european (I have lived a year in US though....), I don't understand, why you don't simply make & eat your own Oats porrige? It's easy, healtier...
Scott, I do exactly refer (100 % clean) to this one specialist Mill, who has it "all the way" - no other grains on farm, clean trucks, process line solely to Oats in separate building. Also control on fields, advising - all you can do to keep it clean. Very much different than what the other Mills do by trying to keep it "sort of ok", in other word less...
As a farmer and advisor/writer, plus following these things I started to check, if or not optical graders can really glean foreing kernels away from oats. Checking this, because we have a few mills/processors who do the optical grading and claim it cleans (i.e under 25 ppm glutein) the material well enough. And the we also have a mills who do it 100 % clean...