I can't totally disagree with charging money for such sessions. In China (any practically everywhere else) monks had to go to kings, princes and officials to get appropriate support for entire monasteries and such. Today that is not the situation, but things still cost money. In the old times religious things were covered by the taxes paid to the state or directly to the church. In many countries today that is not even an option, or only a couple of locally important churches (Catholic, Kalvinist, Lutheran, Paroslav, etc.) recieve such money from the state. Another historical example, Genpo roshi may have a Harley, in the old times (and in traditional countries) they have silk-brocade robes, golden statues, etc. It is a big illusion to believe that Buddhist organisations can miraculously function without material wealth, and with wealth comes corruption and other such things.
"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind."
(Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p254)
“If you recognize the world of appearance and existence as the mind, realize the mind itself as empty, and have no grasping at the superiority of your realizations — this is the ultimate view."
(Chegom Dzongpa, in "The Book of Kadam", Wisdom Pub, p609)