To benefit from any new Hubber referrals, just go into your account page 'my account' at the top of the screen. Select 'URL Trackers'. There should be one already there for you, or you can create a new one.
You then use this tracker code in a link, right after the 'hubpages.com/' part of the URL link. Just remember to use an underscore before your tracker code. So, for new signups you would type:
or...I've actually had way more traffic views and signups with this link:
I hope that's clear enough.