We originally encouraged a client to install Statcounter because they suspected click fraud from competing businesses. Talking to the client recently they said the Statcounter data had also been invaluable for finding new leads.
By looking at the visitor information they could see the name of many of the companies who had visited the site but had not made an inquiry at the time. With a bit of basic detective work they found the telephone number and contacted the business directly a few days later.
So far they have obtained several successful leads using this method.