Depending on what proxy server people are using to view yahoos boards, will determine how much of the forum they can view.
Ie.....
If they try to view the boards with a standard proxy server, they wont see anything new, (will appear as though noone has posted there for a while) however, if they use a new /different VPN server, (one they are circulating among themselves) you will see the new topics in the coffee lounge.
Close reserve apparently...
;P
Very very clever...
But not clever enough!
... In other words, they are only allowing some to view their forums entire content, yet aren't divulging the full blow to sight see'ers.....Those not in the click!!