The silence is deafening, isn't it Kathleen? I've wondered about the answer to that question myself.
I just spent a little time scrolling through forums and note a trend that I suspected was there: A whole ton of queries posted, that get replies, and then the original poster (the queryist) never shows up to collect the answer and thank the respondent.
Personally if I posted a question I would check back, whether or not I had a notification in my email. I would check "just in case" for maybe the first week or two after posting.
But many people don't seem to check back at all after posting a query. This makes responding to a question a rather dreary and pointless enterprise. Surely the failure of querists to show up to collect their answer and thank their volunteer researcher must have a chilling effect on the efficacy of the Genforum message boards!
Why doesn't Genforum see this as a central, critical issue? If notifications are problematic (if they are having trouble fixing that problem), then Genforum should post instructions to people who post a query, telling them to check back, to be sure to respond to their volunteers, to be sure to thank the people offering their time and research skills.
Volunteer researchers who soldier on in spite of all this amaze me.