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]
(..) - I'll keep digging. - Yeah. Alfred! Why did the Wayne Foundation stop funding boys' homes in the city? The foundation is funded by the profits of Wayne Enterprises. There have to be some. - Time to talk to Mr. Fox, I think. - I'll get 'im on the phone. No, no, no, no, no. Do we still have (..)2012 The Dark Knight Rises