I never fully appreciated how critical and important this little enhancement is. It's a must if you're trying to monetize your site as I provides a simple way visually effective tool to get users to want to upgrade since the "premium" memberships are displayed prominently (if you set it up this way). About the only thing I'd say is to fully maximize this benefit you need to invest in good graphics and designs for the badges and emblems. Otherwise it's not gonna motivate nearly as well.