I really like this idea. Whenever I receive advice of this kind, it is always greatly appreciated. However, I think something that needs to be worked in is the context. This would enable people to understand how it relates to them and their current situation.
You begin to touch on it a bit with the inclusion of the fact that their careers continued to progress. I think this would need to be blown out a bit more with more specifics, certainly nothing that would compromise anonymity though. These details could be used to sort the advice for easy reference too. Maybe have general business categories and sizes, as well as, potential business scenarios like applying for jobs, brokering deals, speaking with superiors, etc.