I'd say for every member who posts daily, 200-300 views can be attributed to each one. So let's say we have 12 active members, then 2400-3600 views can go to each for a liberal estimate. I view the site 4-5 times per day, so I don't add more than 30-40 views per day....
That leaves nearly 10,000 views yesterday that didn't come from active posters.