[jonjon10002]

Interesting - I'm curious if the small labels doing releases are using recordable magneto-optical MDs. (I'm assuming so.)

In its heyday, there were a limited number of prerecorded releases, mostly from Sony. They didn't use M-O discs, and were pressed aluminum/plastic inside the shutter case, similar to a CD. They were supposedly much cheaper per-unit, but with a high setup cost.

I still have a handful of the prerecorded ones. My favorite is Pink Floyd's _Delicate Sound of Thunder_, which was two MDs in a special dual case that fit no storage system ever imaginable. Just looked these up on eBay, and I think I figured out my retirement plan.