Eh? I don’t know where you are getting that from, but it’s wrong.
You can’t join. Period.
The subscription system from vBulletin did not port over to Discourse. TubaDiva was investigating some sort of replacement before she passed, but nothing had been decided. I know that our admin and our owners are aware of the situation and this is on the list of things that need to be fixed around here.
Unfortunately, that is all the information we have at the moment.