Our QPD stat started at over 40 questions per day. It is now at about 14. You might be saying, "well, that''s because private beta is finishing up." However, I know from experience that that is the hardest stat to raise. I've never been in a private beta before, but I'm pretty sure this needs action. Once that stat falls, picking it up is next to impossible. That's the main reason so many beta's fail.
Does anyone have any good ideas for keeping the stat where it is (or higher)? I've seen some sites have had users "pledge" to ask a question a day or every week. What other ways can we keep the questions per day stat high?