I'd be interested to know about that too, but also can't see how it's worth what he's charging.
My guess is that he's going to tell everyone where to find chaga and how to use it.
Go find some birch trees and you'll be sure to find chaga if you look long enough. Chop it off with a hatchet and then you can use it in decoctions. If you haven't already, search Google and you'll find plenty of information....and it's FREE :)