I'm a Taoist, have been for years, with study in Buddhism, as well.
I too have had this exact same conversation with a friend of mine, who was a lay Buddhist minister for 15 years.
Here's what I was told. None of this is MY words...I'm repeating what I was told, by someone who lived it.
Here goes...
American Buddhists are nothing like Asian Buddhists...and "real Buddhists" (her words, NOT mine) i. e... Asian Buddhists actually from Asia, do not appreciate, look down upon and have no use for Western Buddhists, because of the perversion of Buddhism, in America, in particular.
They also do not trust Americans.
I asked my friend, the exact same question about why, people who are supposed to live a life of abject, but voluntary poverty, would charge exorbitant prices for the chance to live and study with them when they're supposed to be teaching enlightenment, not materialism and dead serious, my friend looked at me and said, "because Americans are superficial and if you think impressing people by following what you people have turned into a fad and trend - no, my friend was not American and we fostered free speech to each other - then they would be happy to take the money."
Just my .02 from a studier of all Eastern philosophy and someone who drove my Buddhist minister friend, NUTS, with my studies and questions.
Good luck...