you¡¯re right about the difference between those wanting to add to the conversation and those who are just looking for traffic. Read through any long thread of comments and you¡¯ll generally find a number of people restating what¡¯s already been said. It shows that they had little interest in being part of what¡¯s going on and more interest in just being seen to have their say.
As far as generating comments, as your post says, the conclusion is vitally important. I remember hearing from a radio broadcast expert who taught that the very first thing you should think about is the final line of what you want to say on air. That¡¯s what causes the listener to think, ¡°me too¡±, involving them in what you¡¯ve said. ¿Â¶óÀÎÆ÷