Every once in a while, I discover something I had not known about the Collector Forums.
If you start at the bottom of the main page (listing all the forums by category) you'll find this record of the number of visitors in the past 12 hours (720 minutes) Click on the main photo at the top of every page to get to this main page.
Click on the underlined text "Collector Forums Recent Visitors..." (not in the picture above) and you'll see the 10 most visited Forums and 20 most viewed topics in the past 12 hours.
Since this picture was captured at 5:30 am my time, the count isn't very high -- it's usually over 200 by evening.
There's also a note on the 12 hour period when the count was the highest.