We are a member of the Clickbank Apex Elite. Which means we are among the top 100 affiliates for Clickbank. (There's a total of approximately 100,000 active affiliates in clickbank now)
Our main skill in earning our place in the top 100 is SEO and writing copy for review/presell pages.
Why do we hawk our service out here in Elance when we're already earning a nice living from Clickbank? Why not? Its a win win situation for all us since we cannot be in all niches at once.