I'm not entirely sure I understand the question entirely, so I'll do my best. If someone follows your hub, that means that when someone comments on it, they'll have it at the top of their home page or get a email on it. That means they can go back and add more comments onto your site.
If you follow someone else's hub, that means it will be on your homepage or email, but does not affect the traffic on your pages.
I hope this helps. If not, please clarify and hopefully someone will be able to answer your question.