Fascinating. I'm not sure what would drive someone to do this, since until the child can actually go to the toilet on their own, you haven't achieved the actual point (IMO) of the training.
She had only cloth diapers, no washing machine, she had to wash them by hand and boil them to disinfect them. I guess the time lost just waiting for me to go was better than the time lost doing all that cleaning. I was her second so she had experience doing this.