How much pay do self-publishers get?

While officially published authors often earn between 10% and 12% in royalties, self publishers authors can make between 40% and 60% on the retail price of a single book.

Self-publishing used to be called "vanity publishing" for a very good reason: because that's, essentially, exactly all that it is. The vast majority of self-published authors never earn a dime from their books; in fact, self-publishing typically costs them money. Usually, only the most basic publishing services are free, but all of the simplest necessary "options" (such as layout choices, cover design and/or photos, author biographies and/or photo, front and back matter, ISBN and/or Library of Congress filing, etc.) all jack up the price quickly; so does any option relating to listing the book anywhere it could conceivably sell online, along with any promotional materials that are absolutely necessary (but hardly sufficient) to actually sell any books. They also charge extremely high prices for author copies beyond the one or two copies included in any package. The vast majority of self-published authors never actually sell a single book; they just buy a few boxes of their own books to put on their bookshelves, to give out to friends and family, and to be able to tell people that they're "published authors."

Well, if you are a self publisher on Patreon, you earn quite more than that. Self publishing has actually evolved beyond the "vanity publication". These days, people of a specific interest can get together to read about what interests them the most, while paying the writer a premium for his articles and novels (as chapters are published). The monthly membership helps the self-publisher gain more through paid advertising on their sites as well. So while self publication may still be useful for those that believe in print and the early form of ebooks, the money to be made is really in the paid membership publications. Call it a higher level of "vanity publication".