I was getting lots of notifications. I thought too many. It turned out a few threads were set to "Instant". I changed everything to "Daily". Now I don't get any notifications. When I manually visit one thread, I see lots of activity, about which I was not notified.
I do have a tendency to log in, select "keep me logged in" (if there is such an option), and not log out. I close the tab most of the time. On my desktop machine, I close the browser and shut down the computer. Does the XDA server consider me to be logged in, and therefore aware of all posting activity? (So it never generates a Daily notification?)
I'm setting this thread to "Instant".