Depends on the type of hub.
If you wrote a hub about a hot topic or news story-esque subject you're going to have a ton of initial views and then they all dry up.
If you wrote a hub about something evergreen (tutorials, guides, reviews, essays, etc.) then even without backlinking and promotion your hub will probably start to get more traffic from search engines as it gets older (that doesn't mean you shouldn't backlink and promote though!).