From NYT: According to the letter Mr. Savage submitted to the Justice Department, Google at first gave him nothing but encouragement, even naming Sourcetool its AdSense site of the week at one point. By May 2006 — with the company barely six months old — it was making around $115,000 a month on $653,000 in revenue. According to Mr. Savage, his biggest expense was paying Google to advertise against search terms, which was costing around $500,000 a month.