Assuming that I have a great website which can make tons of money if it is located in the 1st page. However, since the SEO service I used is not good enough, the site is located in the page 2 or 3 only. Could that site make a little money ? If you have experienced this, I would like to do a little survey: - Where is your site located in Google page ? - How much income does the site create ? By answering 2 questions above, we can see the concern between income and the site's rank order, which I personally think it's important in making money online.