Similar story as Four Roses rye whiskey, they make most of the rye whiskey in the United States and it all gets relabeled and marked up by branding marketing etc...
(MGPI rye is quite good, but you shouldn't pay a premium for it. They're finally doing their own bottlings now, which is good news for consumers.)
Four Roses is owned by Kirin Holdings, one of the top alcoholic beverage conglomerates.
It was the case that the Four Roses brand was heavily tarnished for decades as a blended whiskey, when owned by Seagrams.