I hope the guys won't mind me saying, but the newsletter is written every month - but doesn't always get sent, I think for operational reasons. After writing there are still some processes it has to go through before it's issued from eBid Towers, and pressure of work on more important aspects of the site tend to mean they don't always prioritise doing that, I believe.
This is entirely my personal interpretation and is in no way an official response. I try not to get into discussions about the newsletter as I think it would be inappropriate, but equally I'd hate anybody to think I don't supply it and just leave a client hanging!