I'm guessing that Message Boards of this format are passe' and that Twitter or perhaps facebook pages are what MLB sees as the future. I know our traffic volume has been declining for years since 2013 (world series or bust).
Our posts peaked in 2011 and 2012, in the 240- 250,000 range. Last year, we were down to 106 thousand. Last year, we had the most on-line, 666, beating our peaks in 2015 and 2012 by over 100. New topics are down 60% from peak, but that may be because I used to split topics up a lot and now we seem to have a lot of megathreads on players or "the offseason." Page views are about the only thing that's up over the past 3 years. Maybe folks lurk here but do not post, or maybe it is fans of other clubs googling and finding us and peaking during series.