Not all webmasters can be successfully PPC programs like the above-mentioned system.
Many webmasters are not able to meet the critical elements of success of Google AdSense.
the critical elements  are :

• Cost per click (CPC)
  Because AdSense is a PPC program, your income in part be based on what is the cost of each click. The ability to find keywords that are high costs for more AdSense would certainly open doors for maximum benefits of this business. You can get 100 clicks every 24 hours, for example, but if ad simply pay a cent for each click, you can have a single dollar as your price for the day. On the other hand, if an ad pays, say $ 0.15 per click, it is a moment fifteen dollars for a period of 24 hours, which is excellent for a single website. Therefore, just think, if an ad is worth $ 1 or $ 2 per click. Discover the CPC is not really simple.

• Traffic
  Visitors are the lifeblood of any company via the Internet, AdSense-registered websites as part of the list. You have to drive traffic - much traffic - for a good chance of generating clicks - lots of clicks.

• Clickthrough Rate (CTR)
  CTR refers to the proportion of people who really click on the ads displayed on Web pages. Your goal is to achieve a high CTR to succeed through AdSense. A high CTR can be achieved by attracting the right ads per page - which can be done with the content carried by keyword and correct optimization - and the proper placement of ads on the structure of each Web page.