Three of these people knew who Janie was, but had never met her. They were just curious about her life story. The other person (who bought 4 books) might have been one of Janie's "kids" from the Program Bureau at BYU. She may have performed in her shows. I don't really know.
What I do know is that it is very gratifying that people remember Janie and want to buy this book about her. (I hope they share it with their grandchildren.)
In her later years, she was often asked to perform. It surprised her that into her late 80's she was still appreciated as a singer. Even at the time of her death, she was planning shows and writing music. Let that be an example to us all of enduring to the end --- with ambition and style!