Earn Double WestJet Dollars between Calgary & Chicago

To help promote their new route between Calgary & Chicago, WestJet will be offering their Rewards members Double WestJet dollars on the route.  I don't have all the details yet but know that you will have to register for it (WestJet will send out an email with the invitation link) and you must register by July 15 for travel between June 3 and September 3, 2012