I am using the "subscribe to all posts by a user" to be the same things as a "Follower" on my site and would like to notify users when they have new subscribers. I was expecting to be able to use the rules module to accomplish this, but I see no "Event" type that will allow me to do this. It would be a great addition to this module to have an event type "user subscribed to all posts by a user" so I could award userpoints and send emails when this occurs.