Question for writers: would you be happy to work for a fixed (set by you) price? Think an artist receiving a commission or a technical author who produces work-for-hire (where they don't retain copyright).
I'm thinking of something like
Unbound which is a form of publishing where authors set a target amount for a project, pitch it on the website and then invite people to pay towards it. You pay different levels for different "rewards" e.g the basic ebook, signed hard-copy, lunch with the author etc. There's also a time deadline and if the target is not reached by then monies are refunded.
I'm very interested to see how it turns out. Of course Unbound are working in the existing copyright regime and also will DRM the ebooks if the authors want to (
though they'd prefer not to). So there is still the potential to make lots of extra cash from a bestseller. However the basic model would work - if it works - in a world without copyright. Essentially you set a bar below which you don't publish at all. Above that the site could function on a tip-jar model.
I think something like this could be the future.