In addition to the comment threads on their pages, each site using Disqus will also have a Site Profile. The site profile is where users may:
Follow the site
View active discussions created by that Site
View the top commenters of the community
Viewing a Site's Profile
Once you've commented on a site, you may visit their Site Profile by clicking their site name at the top of any comment on your user profile:
Viewing a Site's Active Discussions
Once on the Site Profile, you may view a list of active Discussions from that forum. This section will show all threads that have had at least one comment posted to them within a week of thread creation.
Following and interacting with a site
Follow a community or a site by going to their page and clicking on the follow button in the top banner. Once you start following the site, new content will start flowing into your home feed. You may also view the site's Top Commenters by clicking the Top Commenters option below the Follow button.