My earnings are also low... but this is usual for me... :(
However, I intend to place the google code on some password restricted pages also. This way I will have a lot more impressions.
Is there an easy way to let search engines to spider my password protected pages? If I have a list of IPs that are used by search engines, I can simply code the site to not ask for username and password on restricted pages if the IP address is in a certain range. Any pros / contras on this change? Is this advised?