I'm fairly sure that when you click a user's name when you're not a member, you get asked to log in.
Try logging out and doing it, I'm sure that's what happens. So I don't think that's the answer.
Interesting though, since Reasons doesn't have a referrer link in her sig, or anything. I'm curious now, too
I only get my referrals in my profile because Jan70 showed me how to add one to my sig.