No, it's not true. From their Terms of Use:

"Except as expressly stated herein and without limitation, you agree that you will not, nor will you permit or encourage any third party to, reproduce, publicly display, or otherwise make accessible on or through any other Web site, application, or service any reviews, ratings, and/or profile information about real estate, lending, or other professionals, underlying images of or information about real estate listings, or other data or content available through the Services."

So yes, McMansion Hell could be violating their terms of use.