Luke, there are a lot of factors that influence those metrics and it's not fair to make an assumption like that without considering them all.
There is no arguing that the forum's activity has declined, but it's not just our forum, it's the industry as a whole. In November 2010, this industry underwent a boom which was brought on by the storage auction reality shows. Nowadays, interest in storage auctions is near what it was before storage auctions were thrust into the limelight. You didn't think the "gold rush" would last forever did you?
Now, some of the stats you see in the info center are accurate, while others are way off. Luke, you know that, you own a SMF forum as well. New topics and posts are accurate. New member stats are influenced by a number of factors, one of which being how aggressive the admin/mods are against spam registrations. Most online and page views are completely inaccurate since there isn't a way for us to tell real users from bots and spiders.
Now, take a look at the monthly page views and see if you can tell when they plummeted. February & March 2014 right? Know what other event corresponds with that date? The forum, which was StorageAuctionForums.com, was moved to OnlineStorageAuctions.com. Even though we did a site wide 301 redirect, a lot of the old content wasn't re-indexed by the search engines. It was an unfortunate but necessary side effect. I knew it would take time to completely recover, but moving the forum to OSA was crucial to the site's growth. But don't let those numbers fool you, our visitors and page views are at an all time high.