Facebook is testing out a new feature that lets you subscribe to all of the actions of a specific user. This means you won’t miss any notifications whenever a user does an action. Right now Facebook picks and chooses what shows up on your News Feed using an algorithm.
This may lead to a fan count or subscriber count for users, just like Twitter does. Right now the new feature is just in test mode so don’t expect it on your profile anytime soon.
These updates include status updates, photos being uploaded, and links being shared. The feature is currently only being tested on a small percentage of users.