The developers are currently tinkering with the Addventure login access. We'll have to wait and see...
Judging by my experience just now when I attempted to go to the addventure's home page, they've made it so that being logged in to the forum is no longer sufficient and only paying subscribers have access. Hopefully that was accidental rather than deliberate. The error message that I get includes:
"Access Denied
You have no access to Folder Addventure (
http://old.bearchive.com/~addventure). Visit order page to order additional subscriptions."
ETA: I've now found that I can avoid this by editing my bookmark for the addventure so that it is for old.bearchive.com rather than
www.bearchive,com. But if things stay like this, the number of people using the addventure can only decline still further, as I'm sure many will just give up rather than finding a work-around.