Joining other sites that allow business owners to comment on reviews, RHD/Dex announced the feature today:
Dex advertisers will be able to post comments by logging onto their DexKnows.com account and access the site’s secure Account Management System (AMS). They can click on the “Reviews” tab to view all ratings and reviews that are displayed on their DexKnows.com business profile, select the comments they would like to respond to and post responses directly from the AMS. Advertiser-generated responses will be added to their DexKnows.com business listing page for the public to see and can be edited or deleted by the advertiser at any time.
Beyond simply being fair, this is a good hook to get SMBs to sign up for accounts or claim their listings.