He 'profited by' his experience/mistake. [=he learned something useful from his experience/mistake]
The book can be read with 'profit' by anyone who wants to understand how the system works.
We sold the house 'at a profit'. [=we made a profit when we sold our house]
(..) the U.N., back in . Caused a few ripples. Sidelined your career. Thought you'd have parlayed those ripples into a self-righteous book. No nose for profit. How did Israel know? We intercepted a communique from an Indian general saying they were fighting the Rakshasha. (..)2013 World War Z