How did Maharaj's healing practices change over time, according to the introduction?

According to the introduction in Chapter 0, Maharaj's methods for healing people evolved. Initially, he would actively give out medicines to those in need and would not accept any payment for this service. The text highlights his personal involvement, stating that if a patient was not being cared for properly, Maharaj would go and tend to them himself. However, this practice changed later on. As Chapter 0 mentions, Maharaj himself told the author, "Kaka... I used to give medicine to people before." He then stopped distributing medicine and instead began to give only Udi, or sacred ash, which his devotees also found to be beneficial for their ailments.