this is something I don't understand now. I can understand not wanting to print albums or CDs that cost money and may have a small following. But it is pretty much free to post on Bandcamp and let folks pay to download. Why wouldn't artists or even record companies want to do that with their back catalog?
There was a blog I followed several years ago where this guy was making high quality recordings of out of print vinyl, never issued to CD, albums and posting MP3 files to his blog, mostly 60s and 70s jazz that I would never had heard of. Of course he got shut down when some record company found out about it and threatened legal action. Of course it was copyright violation but this was material that literally could not be bought anymore and thus could not generate income for the copyright holders. Why wouldn't they want to post that stuff for sale for essentially no cost, pure profit? Makes no sense.