In conclusion, a self-publisher of books is both a publisher AND an author.
Since self-publishers are publishers as proved above, they belong to the parent page. Furthermore, the purpose of Sensei's Library is to provide information - it is not to hide information.
Anonymous: The problem with equating self publishers with publishers here is that it creates a potential explosion in what can be listed. Publishers was there to list Go Book Publishing Companies. If you change that to mean anyone or thing that published something about Go, there is really no limit to what you can work into the page.
Look at https://www.amazon.com/Three-Stone-Games-Guo-Bailing/dp/1494809559 and you will see that the publisher is listed as "CreateSpace? Independent Publishing Platform". A publishing company which offers self publishing allows authors to publish any old tat they like so long as they cough up the money for doing so.
I would prefer a new page with a list of self published books.
Else we can start to add everything in here, like TaijisBooks
RobertJasiek: I see what you are afraid of.
Matters are a bit complicated. Some publishers perceived as likely to be companies have also self-published something: a) Yutopian / Sidney Yuan / Go Winds journal, b) Brett und Stein Verlag (sounds like a company but I do not know if it is registered as some) / Gunnar Dickfeld / some German beginner books. Maybe there are more such publishers.
There might be many Asian go book publishing companies or self-publishers, recently apparently an increasing number with English texts / translations. However, we cannot easily criticise translations because Ishi Press, Yutopian, Slate&Shell have also published many translations.
The page title Publisher is liberal and should include everything. A different page Publishing Companies might also exist but - verifying which is a registered company and which just carries some publishing word in the advertising name can be hard. Yet another page might be for Self Publishers. Yet another for authors.
Rather I think that currently we do not have a page size problem because the page does not list too many publishers.
There is also a variety in quality of contents from books newly written after months to years of work to simple translation of old books now out of copyright. If the latter flood us some time, we can then still put them to an extra page. Please do not confuse them with my books, which belong to the former. What some others publishers do (modern book translations) might sometimes also require months of negotiation work so is appreciated.
Let us be tolerant as long as we can. If the list of publishers becomes longer than the list of English go books, we can reconsider things.