Another wonderful informative article @firepower :) The app looks interesting and waiting for it to be live. As you mentioned, a better notification system could definitely help to an extent to notify all the followers including ghost ones. To make them engage, it would be the question of motivation/incentive. And it may be that the engagements are decided based on the individual profile strength than the real content or one's effort. In my opinion, if we can conceal some information that decides one's engagement that may do justice. Having said this, these are just my genuine points from my observation and not to hurt anyone's feeling :)