How do Yahoo Contacts work?

I keep getting emails from Yahoo advising me that a contributor has added me as a contact, and adding this message:

"...If you'd like, you can add ??? as a Contact too. Just follow this link:

http://answers.yahoo.com/my/contacts/invite/ ..."

Obviously I would like, at the very least, to acknowledge that person's request but, if I click on the link, all it does is take me to my own profile and activity. There is no mention of adding a contact. Indeed, I can find no way of doing this on any page. Does simply clicking on the link do the trick and, if it does, does that action tell the inviter that I have accepted his or her invitation?

I can't ask Yahoo since I am convinced that only robots work in their customer care department, judging by the automated answers that I receive (all identical word for word).

So, amongst the many erudite contributors here, is there someone who can advise me?