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]
(..) Apparently. Do you have any idea of the capital that this bank has invested in you, Gru? With far too few of your sinister plots actually turning a profit. How can I put it? Let's say this apple is you. If we don't start getting our money back... Get the picture? (..)2010 Despicable Me