The Doctor who did my 1st TP (Dr. Chao) does do a number of freebies throughout the year as part of his community outreach to help those in need for a variety of reasons. I would assume there are others who also volunteer their very specialized services that we have no knowledge of, nor would we need to know.
Now keep in mind, Dr. Mohebi is not only doing the procedure for free, he is paying an L.A. Film Crew to document the process - that cost alone is waaay above what a TP would cost - not to mention his daily overhead costs. He is doing this for educational and business purposes.
I was called in (as a contestant) for a full consultation. I have met the good Dr. and his Staff- and he did a full evaluation of my suitability. I am certain that Dr. Mohebi has specific parameters of information that he wants to make sure the document conveys - my needs aside, it's his film and I am sure he has specific topics and procedures he wants to have in the final product.
Good luck to all who have put themselves out there ~ if I am fortunate enough to be chosen, I will serve as ambassador for the HTN and document behind the scenes for you all.