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]
(..) Do you think it'll sell? That depends on the quote. Let's see now. There's the airplane ticket over and import duties, hidden taxes, profit markup-- A steal at $ . Eleven hundred? They ought to list that dress on the stock exchange. We sell a dozen a day in this price range. (..)1954 Rear Window