Well, we're finite creatures so I guess we will not really be able to answer that question with any surety. However, I imagine that God probably uses these threads to sanctify us, even if no one embraces the great truths of reformed Christianity because of our input. So, in that way that are most certainly of value. I know that I personally have to exercise a whole lot of patience, and I learn how little patience I have, when I engage in these types of threads.
My personal opinion is that our participation is valuable so long as we can answer in the Spirit. When we start getting angry and responding in anger they only serve to show our weakness and insult fellow Christians.
wise words brother