I don't think that Dragon Ball is unethical. I think that the authors and
publishers of Dragon Ball are doing something unethical when they restrict
people from redistributing Dragon Ball. That's a very important distinction.
> Because in my opinion this render "pay what ever you want" impossible,
anyone could set a site that looks somewhat official and sell your work.
That's called competition, and it's perfectly legitimate. As a matter of
fact, people can also compete by offering gratis copies, and that is
perfectly legitimate, too.
It's how capitalism works. I'm sorry, but additional copies of works just
aren't that valuable in the digital age, so if multiple people have copies,
you should expect its price to quickly drop to 0. Artists need to find other
ways to get people to pay for their work (e.g. crowdfunding, live
performances, or asking for donations), or do their work without getting paid
much and get their money somewhere else. By the way, this is the state of
affairs with copyright anyway; it's the publishers who make money from
copyright monopolies, not the artists.