On the other hand, I was getting about (please, don't laugh) US$10 a month out of AdSense in my blog (which is not really a blog, but I gave up naming it anything else) when Google said there were fraudulent clicks coming from my site and that they would not tell anything more about it because that would compromise their detection techniques, but, still, I was banned from AdSense for life.

In the end, it worked out: I changed banner providers (I started rotating between two international networks and two local web merchants, adjusting probability of each source according to origin and revenue stats) and have a much better ad revenue (which is not to say it is anything great, but just about anything is better than US$10/month)

I wonder how many people have similar experiences.