There isn't any more light to shed. I used D.Buzz and expected to get some sort of feedback, but nothing happened. It's not a hard dApp to use in a technical sense, but in terms of social interactivity I get nothing.
It took me a month to figure out how to get feedback and engagement using the blog, and I don't want to spend another month trying to figure out D.Buzz when I can be more productive on the blog side of Hive.