Indeed. Well first I'd just like to thanks @tarazkp for being my mentor and friend... :)
I did a few stats yesterday, so many posts rewarded by well known curation groups without a comment. I guess they could be trying to uncover the author but do think they if they are continually rewarded without needing to engage that it sets a bad precedent.
I agree completely, engagement should be promoted as keenly as a post itself. I've ceased to vote on users in the past because they didn't engage, despite them doing good posts. Not getting a response to a comment I leave is a sure way to push me away.