Facebook Adds Subscribe Feature to Comments

With the Subscribe feature you can choose what types of updates you see from people in News Feed. You can also use the button to hear from someone who is not your friend or let people that are not even on your friend list hear from you. The link will only appear on public comments made by Facebook users who have allowed other users to subscribe their updates.

The move is an evolution of the subscribe button the social-networking giant added last month to user profiles, which gives users the option of subscribing to all, most, or only important updates the other person posts to the site. Those updates show up in the user's news feed. 

Facebook is also letting people subscribe to news feeds of users they're not friends with. Upon doing so, they will see the public updates the person has shared on their profile. And like with friends, users will be able to determine how many of those updates they will see in their news feed.