I believe at last count ( in the latest update ), the total was just over at 80 HTML5 Game Publishers. In addition there's an extensive leads list of publishers and portals that are unconfirmed for licensing games. I also include all of the flash game publishers, of many are now accepting html5 games.
I am prohibited from disclosing my sales numbers publicly for several business reasons but, I will say that I don't think I would have done very well if had I not devoted many months into developing this list prior to submitting my games to publishers.
However, it's not a magic bullet. How well you will do with your games is going to you depend on the quality of your game, how well they meet the criteria, genre, and technical specifications of what a particular publisher is looking for. Many publishers have different expectations. You will have good and bad experiences along the way.
The Big List is without a doubt the only and most extensive list of HTML5 Game publishers available and will save you countless hours of research.
I have never had a complaint and have had nothing but good responses from developers for the book since its release to date.
I try to update the book frequently (as new sources become available) and updates are free for life.
Also feel free to reach out to me any time with questions concerning you game(s).
Hope this helps answer your question and Good Luck with your games.