Yes it was free in the olden times, so was drinking water. We have moved away from those systems now. As the wisdom of the past is being reinterpreted to be relevant to current times, so is the manner of teaching and sharing. The ancient knowledge is definitely priceless, she is only charging for the time cost. As a householder, dispensing with her own responsibilities she has taken on the mantle of sharing the wisdom with those in need of it.