I couldn't find anything on the site about selling ceremony or spirituality.
It looks like personal development/motivational education programs in American Indian wrapping paper to me. Plus they call them performances. Education via performance. A very effective education method. If there is a congruency between the cultural background of the performer and the personal development/motivational material they are presenting, is there anything wrong with using the dress, music, stories of that culture as a part of the program? It felt a bit over the top and theatric to me but I bet it works great for kids and teens. In fact I wonder what would happen if they presented to corporate "suits". Would casual friday become "buckskin friday"?
As far as Talltree admiting he does not percieve it as work, that's just motivational speaker code for "I love my job"
ln order to know if the charges were excessive, you'd have to compare it to what other programs (personal development/motivation, not American Indian) cost. There is a market for these programs with schools and companies, and the charges are high. It's an industry in itself.