As mentioned in the article, sometimes she was more of a very cheaply priced therapist. Just letting people talk and feel heard. A naturopath friend of mine says something very similar. It's amazing how much better people do when they feel like they have someone to talk to who really cares and will take their time with them. The pills the patients leave with may not do much, but the 90 minutes she spent in intimate conversation with them really appears to.
I think a lot of people who use these services sort of know that this is the case, even if it's not explicit in their mind.