I have been wondering for a few months why I could not get certain keywords to rank, not even in the top 100, they certainly did not look all that competitive, and 3 days ago, out of the blue, six keywords started to rank in the top 100, and today, all those keywords are gone. When it comes to google, you never know if you are doing anything right, or if everything you have been doing is wrong; I finally get a little something, then google takes it away just as fast... If you ask me, relying on google is just as dangerous as relying on affiliate programs thinking they will pay you rather then waking up to a closed account....