I've been asked to take a value profile.leadx and put it at the end of a link ?someValue=x so that it is unique to each offerEligible user.  I found this link: Pass dynamic data into offers but when I update the link to include ?someValue=$(profile.leadx) all I get is that text exactly and no value....

I am creating Activities with form composed Experience Targeting.  The page displaying the ad is behind a login but when you click you go to a landing page (different sub-domain) where the user can access a special offer available only to qualified users.  The problem is that the landing page is out...