Over on the Jobster blog there’s information on how to become a Jobster affiliate. 

Affiliates are paid $1 per job inquiry and $0.50 for each profile creation that results from their site.

Rather than a pre-rendered Javascript widget, affiliates receive an XML feed of jobs which they can mix into their site content in any fashion they wish. This is a higher technical barrier to entry but allows the jobs to be deeply integrated into the site to maximize revenues.