While there is a strong argument that the reader should decide and that trade publishers sometimes impose economic criteria at the expense if literary content the present ebook sites have thrown all caution to the wind. The author wanting to use an ebook site needs to consider several factors. Ask questions and do not rely upon the answers received. Talk to other authors using the site. Make sure you retain full copyright.
Some sites assume all electronic rights that can be very restrictive.
Ebook publishing is attractive and even more so now it is being linked to print on demand publishing. The ebook is ready to be printed, and one copy at a time can now be printed. Bookshops in the future may well be an attractive mix of coffee shop, book display centre and print shop. Authors will be able to effectively reach readers. Quality will remain very important.