Everything,
I never practiced Trancendal Meditation but have paid for many $1000 courses and much more for information I wanted. A teacher has the right to charge what he feels his time or information is worth. If someone does not want to pay then they should look for another teacher. The reason why noone reveals the trancendenatal meditation on youtube is obvious. Would you pay $1000 for a course then go post the course on youtube for free for everyone else? The stars that wrote comments were most likely paid to make comments and or get a piece so that is another reason for the cost.
About the right to freely share info. We do have that right! Some teachers make their living teaching and they charge alot because many students teach without their permission. I have seen student just learn info and go make a youtube video and post everything that was taught. So if the teacher charged a student very little money the student is more likely to do that. If he charges alot of money it protects the masters intellectual product in a way.