I am an Ellechor author so perhaps I can provide some insight based on my experience. My first book, Alizel's Song, will come out next month. So while I can't yet speak to the sales numbers, I can relay some information based on my relationship with them so far.
Ellechor is a traditional publisher that fronted all of the costs for production of my book, as well as gave me free copies. I went through 5 rounds of editing with the acquisitions, developmental, and copy editors. They also paid for a professional to do the cover and format the interior. They are releasing three other books with mine and they do 4 releases a year. To me that says that they are focused on quality over quantity. As referenced above they are a fairly new company, but it seems like they are growing.
The only thing I paid for was extra copies of my book to sell at signings and some physical storefronts I own. The exact deal depends on the quantity ordered. I think I got mine for about 50% off the cover price. They expect that authors be active at marketing and selling their own books in general, but I was never required or pressured to purchase any specific number.
I believe that they are also starting their own POD and Ebook imprints, as is the case with many publishers. These are separate from their main line of books, however.