The rights to the films featured in most MST3K episodes were purchased for only a few years and, in the majority of cases, those rights have expired, and will have to be renewed before the episodes can be shown on TV or released on video and DVD. In quite many cases the rights owners have set prices prohibitively high; in a few cases they are apparently doing so to suppress the episodes in which their property was ridiculed.Link (scroll down about half-way) Discuss (Thanks, Ren!)
If the Court had overturned the copyright extension, an undetermined number of films featured in MST3K episodes might have gained "public domain" status, markedly lowering the price TV networks or video distributors would have had to pay to make those episodes available.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.