They have to be making SOME profit on the title to continue - and thankfully "off-the-shelf" masters exist. The problem is most MOD programs are using whatever the lowest cost media available, and not quality made media. Produced right - DVD-R/+R media should last decades. It goes down to the quality of the dyes, and the materials used to make the disc. What are the studios using? They can't make the numbers work as a standard DVD release with wider circulation, why would they wouldn't want to limit themselves to a "Select" release with limited distribution.