It might be worthwhile to see if you have any e-Rewards invitations in your email inbox or spam folder. According to the terms and conditions of this promotion you would need to be an e-Rewards member in order for the sign up bonuses to show up. YMMV, however.
Here are the Terms and conditions of this offer
e-Rewards members must enroll in Club Carlson using the link provided via email by e-Rewards by May 31, 2012 (“Promotional Period”). This offer is limited to a maximum of 4,500 bonus Gold Points per person. Offer only valid for new Club Carlson members without an existing account. Promotional bonus Gold Points will be posted to the member’s Club Carlson account within 6-8 weeks of enrollment date. The name on the e-Rewards program account and Club Carlson account must be the same. Offer is valid only to the enrolled recipient, is non-transferable, may not be sold, and is subject to change or termination without notice. By enrolling in Club Carlson and participating in this offer, you agree to the Club Carlson program terms and conditions.