The author has said he needs more interest & sponsoring in the plugin.
I believe Post Voting also does something similar but imho the Journal plugin may have some better options.
Confirmed
It would need to be tested. But if you are looking to mimic journal plugin in that only do to speak Op can post/reply with others only being able comment. Using topic voting with restricted replies may work.
Though iirc I think the journal pluginsu allow ppl to reply to other comments.