It's like personal trainers. You made an obligation to someone else to show up at 7am at the gym 3 times a week, and that alone is enough to make you go to the gym consistently.
btw. I asked the question a year ago whether this whole "boss as a service" was viable and I think it is one of those things that you can't really imagine until you tried it out. I am glad there is now the opportunity to do so ;)