Among the various options:

- Pay in advance, before the product exists.

- Pay for early access that other people don't have. (Yes, in the absence of copyright, people could take the early-access version and share it with others. People already do this today, and that doesn't stop folks from continuing to be patrons anyway.)

- Accept that the 0.0..01% case of absurdly popular works will end up making less money than they otherwise might have. Small price to pay for having a rich and vibrant ecosystem of people sharing things and modifying things.

> Accept that the 0.0..01% case of absurdly popular works will end up making less money

For books and music maybe the difference is not quite that big, but for games and movies these 0.0..01% cost so much more to make that they would definitely not get made if they made significantly less money.

Nobody is stopping you from monetizing your own creative work via the methods you described without a publisher involved today. If those ways of getting paid would create a “rich and vibrant ecosystem of people sharing things”, why doesn’t it already exist?