For me those were among the strongest scenes, I totally bought into the immensity of the Krell complex and was able to suspend belief......but then again I guess it is subjective, I have nephews around 8 & 10 who can't stand the opening shots of Krypton in Superman the Movie because all they can...
I assume from things I have read that Criterion sometimes barters with studios for getting films from their back catalog in exchange (along with the fee of course) for leasing out their supplemental material.....as I say, I assume that is the way it works at least some of the time with...