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]
(..) Now, the orphan Tulip has just turned , which means we can finally liberate her and return her to the human world. But she's no trouble. Oh, she isn't, is she? Here's our profit chart. - I love a good profit chart. - Me, too. Yeah! The peaks are when Tulip is on vacation, (..)2016 Storks