I've just started intense affiliate recruitment and cannot measure if someone becomes an affiliate (downside of Clickbank).
One way to find existing affiliates promoting on sites etc is to Google search your product name, but then there's the others who do paid advertising, email marketing, etc.
I have another course with a in-house affiliate program and you can track in bound links, primary promotional page of affiliates, etc.
How do you find your Clickbank affiliates?
... I just had an idea. Maybe I could measure and track through affiliate email registrations on aweber. Could make sign-ups mandatory to access affiliate materials. I could add a field in there to list a url.