How far back does the history of multi-universal askhistory questions date? What were it's causes, and how long can it be expected to last?

According to the logs of the officers from AskHistorians, it peaked at approximately Stardate 47634.44, or April the first, 2015, in Gregorian reckoning. There are no recent accounts of multiuniversal queries, but Starfleet policy states that you should be directed to the stickied post containing a brief message from the moderators of the sub.