There have always been 2 MoGH landing sites:

http://museumofgaminghistory.org/mogh.php
AND
http://chipguide.themogh.org

Even the drop-down menus are different, except both have a "Resources" tab -- but when you compare those 2 "Resources" tabs, they lead to different things.

As I understand it, the first link above, is for the non-profit MOGH "Museum" organization, where you can become a member, etc. The second link is all oriented around the ChipGuide and its operation. This one has membership signup required (free for CCA members) for the advanced features.

On the other hand, the "museum" link seems all free to the public. There's no place to sign in on that one. (However, you can become a MoGH member at different support levels. I"m still not sure if being a MoGH supporter/member qualifies you to use the advanced ChipGuide features if you're NOT a CCA member. )

(I'm a Life member of both CCA and MoGH and am pleased to support & use both of them all the time. Just pointing to the differences as I understand them. Maybe Charles can articulate further.)