NationBuilder works to integrate your Twitter and Facebook followers and supporters into your nation. Unlike custom social networks, we don't try to fill the role of a stand-alone social site. Rather NationBuilder draws on public Twitter and Facebook data and activities on your site to populate your nation's database and our "public profile" feature. The public profile for a supporter will have things like event RSVPs, donations and other public interactions.
To turn public profiles on or off sitewide, click Websites > Site settings from your control panel and check the "Show public profiles" box.
Click here to learn more about public profiles.