What I can tell you about this plugin is that it allows the people to subscribe to the “Post Comments” and will receive the next comments that other people do on that pertaining post in their emails.
Now, unless you are having an open discussion about something and are curious about what other people might say, this plugin might not be for you and your visitors because nobody really likes their email inbox filling up with messages such as…
Great Post! Keep it up!
Your Completely wrong, this blog sucks.
I agree with you, I will continue to come back to your blog.
In conclusion, I will probably stop using this plugin because there is simply no need for it on my blog. The download link is available here if you are interested. What about yours? Do you use open discussions and subscribe to that posts feed?