I am looking at this question, https://movies.stackexchange.com/q/71/, and wondering if it's a good fit here. It feels more an economy subject.
I would say that it is not on-topic. It is a question of business-models, marketing strategy, product management, technology ... very little to do with the content of Movies.
Technology does impact Movies - as resolutions go up and new technologies like 3D or all digital filming starts to impact the design of movies this is on-topic - but this cost of the disks is not.
I say it should be on-topic.
We seem to be (whether this is adviseable or not) preferring to create format specific rather than genre specific sites. (i.e: literature, movies, comic books, television). Sci-fi is the outlier in that respect.
In my mind it makes no sense to tell someone it doesn't matter where they ask a question about a sci-fi movie's content, but that they definitely can't ask their question about the business of movies on Movies.