Words aren't free anymore

Some people like to make money with Google Adwords advertising system, others like to male art out of it. Have a look at net art : adwords happening, this artist has a great idea to misuse the Google system while having fun. On a more serious side, reading this article allowed me to understand how Google adwords really works and the words pricing is very interesting. 'Free' is the most expensive word on Google and the word "sex" is worth $3,837.