I clicked through to the Click Forensics site to try to understand where they got the 20% fraud number from. It is not there. There is a press release but no me

I clicked through to the Click Forensics site to try to understand where they got the 20% fraud number from. It is not there. There is a press release but no methodology or anything else but the bare number. Understand I do think they are doing sound work that could identify fraud. They use a learning engine on data like IP, user agent, referrer, and post-click behavior, and extract features. What's really missing is distinguishing fraud from what they call low value, unlikely to convert clicks. You might be able to uncover fraudulent behavior patterns as opposed to crappy inbound links. But what is the ratio? What is the method? I looked everywhere for this without reading and watching their marketing sessions...