Thanks, sorry, I thought any tips might apply to both Classic and Threads.

Classic has these registration settings:
Enable Moderation Queue?
Send Admin Mail upon Registration?
Require Unique Email Address?
Validate User Addresses?
Enable Public Name Editing?

I have all of them selected, except for "Enable Moderation Queue" which would mean I'd have to review each new registration an approve it manually. Sometimes I do that, but I don't like to leave it turned on.

How does email confirmation work in threads? The user must click a link in a confirmation email?