profit: From Middle English profit < Old French profit (French: profit). < Latin profectus (“advance, progress, growth, increase, profit”) < proficere (“to go forward, advance, make progress, be profitable or useful”); see proficient. http://en.wiktionary.org/wiki/profit

Similar use in French means something like "I took advantage [of it]".

...or it could just be a reference to the Underpants Gnomes...