There are terms tossed about that are valid known as 'No-Follow' and 'Do-Follow'. I am not sure if that is what you seek with your question. Those terms have nothing to do with a person following a Hubber Profile, a Hub, a Question, or a Forum Post.
That is done when someone manually clicks on 'Follow'. When that is done the Hubber's Profile will be followed. If someone clicks on 'Follow' for a Hubber topic, Hub, Question, or Forum Thread, then when an interaction occurs with those the person following will receive some kind of notification.
The common notification is it will appear in the individual's Feed at their Home Page when signed into HubPages. For instance if I follow George, then when George posts a Hub it will be seen on my Feed at the time the Hub is published. Another notification is through HubPages email service to the Hubber showing activities for Topics, Hubs, Questions, and Forums followed. Again that is manual process to follow those.
Those terms - 'No-Follow; and 'Do-Follow' are directly related to a link within a Hub Article to another webpage somewhere else. It is a Search Engine Optimization (SEO) term. It is an instruction for that link to have no value within the formula (Algorithm) for determining a Page Ranking. HubPages places that instruction 'No-Follow' on links when the Hubber Score falls below 85.
Why that is done has some complexity. To learn that it is best to explore the web about those terms - 'No-Follow' and 'Do-Follow'. Again, it has not anything to do with someone following a Hubber Profile.