I'm quite sure that Sony and Fox study Twilight Time's sales figures and make a heavily underlined note of which titles sell out. When the three year period has elapsed, Sony and Fox can decide what they want to do with those titles: release them themselves or re-new the arrangement with...
Hey, that was quick! I was on the Screen Archives web site yesterday, trying unsuccessfully to pre-order The Blue Max, and they had a message saying 50 were left.
It seems the standard pattern is that when stocks are really low, there is a last minute rush to buy. But who is buying? Enthusiasts...
Good. I love it when Twilight Time discs sell quickly because it means they can continue trading. I have zero interest in these two films but I'm glad others disagree.