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]
(..) ...what would you call it? I am on my ass. Hand me that dish. The green one. The corporation is downsizing the people... ...and upsizing their profits. Oh, Ben, you'll get another job somewhere. Well, let's look in the paper and see. There are the want ads. (..)2002 Spider-Man