From my own experience, clickfraud is not a significant issue. I was running a campaign for one of the windows software centered startups and we were spending over $15,000 a month on AdWords. Amount of fraud was insignificant. It was so small that it didn't make any sense to waste our time on trying to do something about it. Google then instituted a policy by which they pay you back for the fraud they detect.We had less than 30 fraudulent clicks per month.
If you're a startup fighting click fraud, make sure you have a solid value proposition. People will not pay for your service if it doesn't save them at the very least 10-20% of the amount spent on AdWords.
I remember talking to you about this during Startup School weekend. Best of luck with this. Some information on the website about what differentiates you would be good. You shouldn't rely on people signing up just to find out what you're all about.
If you're a startup fighting click fraud, make sure you have a solid value proposition. People will not pay for your service if it doesn't save them at the very least 10-20% of the amount spent on AdWords.