Actually it's what happens when one video service dominates the field. There should be a mass exodus away from Youtube because of their policies, but there are few places people can go and get their fanbase to follow them.
You're the one that said Bowie was keen to make copyright disappear, not me. I'm not keen for copyright to disappear, and neither was Bowie. He simply saw that copyright wouldn't jive well with the internet, and rather than try to fight technological progress, he predicted copyright would lose and decided to think of ways artists could sustain themselves without copyright.
But go ahead and make up your own reality with your petty insults.
1. He wasn't keen on having copyright disappear. He just saw that the internet would clash with copyright law, which it did.
2. Releasing your work as "public domain" is not the same as advocating an end of copyright (or reform of copyright law) because even though he was a leader, it wouldn't change the system. He might make a statement that way but nothing would be gained from it.
3. He could claim his work was "public domain" but legally there's no way to do that. All work is covered by copyright whether you want it to be or not. How long would that public domain status hold up 70 years after his death?