lol, I love reading some of the stuff on here sometimes.
Smithie, the read count on the right is how many different reads there have been since the thread has started.
So every time there's a new post on that thread, and anyone reads it, the post count goes up. Not how any different members have read it, just total reads since it started.
Here's an example.
On the chat section here, there's a thread that's titled "jogging". 2200 posts, and over 11200 reads. That's not 11200 different readers!! That's how many reads the thread has had since it started, be it by people who've posted in it, or just a few members who use that section of the forum.
If you click on the control panel, you can scroll down and see who is online at the moment, usually about 200 people, and just below that, who was online in the last 24 hours, usually about 400 to 500 people.
The total number of members on CIU is about 27,000, so about 1 to 2% are online at any one time.
Now that's only the same bunch of a few hundred people on CIU who actually use the forum, and at least half of them are carpet cleaners!!!! It was started by the owners who are CARPET cleaners!!
It really does make me laugh when I read about how all the windies on here are on their forum.

It's originally a carpet cleaners forum.
Lurkers, as you call them, are people who read comments and threads on here now and again, but don't post. Where's the harm in that?