You can hit the "Following thread" button at the top of a thread, without having post'd in that thread. I assumed this "subscribes" you to that thread so you get notified of updates/posts made in that thread (ie. so you can "follow" it)?
However, it doesn't seem to do that for me? It just adds the thread to "My Followed Threads" list, like a "bookmark"? Is that what it's supposed to be, just a "bookmark"? No notifications?
The only way I can get updates to a thread is to actually write a "post"? Is that the intention?