Yahoo! continue! to! astonish!

There's a Yahoo group I am a member of using a new Gmail account. It's a closed group, so it needs a mod to approve the membership. OK, no problem...

.. until you want to do something in relation to the settings. In this case, I want to set it so that the email account gets no email from the group (and, ideally, no email from Yahoo at all!) while remaining a member of it.

But you can't do that via sending an email, as you could with any decent mailing list. You have to do it via a Yahoo account.

OK, let's look at the welcome email: "Your email address has been added to the email list of a Yahoo! Group. To gain .. easier control of your message delivery options, we highly recommend that you complete your account by connecting your email address to Yahoo account (sic). It is easy and free. Please visit: (address)."

Oooh, perfect...

.. except that link 404s.

OK, let's create a pointless Yahoo account*. So I do that, and then set it up so that the Gmail address is verified as belonging to that account...

.. but Yahoo groups doesn't think that account is a member of it.

OK, let's create a second even more pointless account via logging in with the Google account that is a member of that group. That's done...

.. but Yahoo groups still doesn't think that account is a member of it.

I've emailed the "help", but what is the way to alter your own settings for a Yahoo group you're a member of via being joined other than via an existing Yahoo account?

* Yes, I know the word 'pointless' is redundant in this context.