It seems like another possibility is that Kodak selling fogged film represented an intelligence risk. Kodak distributes film internationally; an adversary could

It seems like another possibility is that Kodak selling fogged film represented an intelligence risk. Kodak distributes film internationally; an adversary could probably correlate production dates with atomic tests and learn about fallout quantities, species, etc without ever entering the US. So the decision may have been made solely on those grounds.