Just click on the link above and get started. You will first have to login or register. Once you've done this, click again on the above link, or click on "Create Scorecard" link on top right hand corner, next cllck on "Twitter" for the choice of scorecard templates and then click on "Create Scorecard" for the My Twitter follower count vs others template.
For the first 100 profiles you track, your subscription will be free. Our pricing page shows you our fees.