It’s NOT bots. Yes, bots can submit more traffic than a “live” person, but there is no way the CGSociety servers could stand up to multiple users each with 38.7 million posts per day.
If you look at their forum home, they only have about 4.2 million posts total in their forums. This doesn’t count forums that they’ve discontinued, but there is no way that they have tens of billions of discontinued posts that aren’t listed.
Even assuming one user with 38.7 million posts per day. That would be ~450 posts per second. I’ve been to the CGTalk forums when a lot of users were on. It can in no way handle that type of traffic.
It is a computing error, plain and simple.
Found another spot on the page that says they have 4.6 million posts total. That number must count the discontinued posts as well. The 4.2 million number was from a total of the individual forum post counts from the main page.