Crowdfunding sites generally allow the users to update whenever they dim fit. But many crowdfunding sites use traffic and early success as indicators of which project to feature and give an impetus to. We generally tend to engage more when things are brand new or when we are about to hit the deadline. It is really important to make an impact or make a splash from the word go. But it is equally important to not slack in the middle, until one is through. One can gauge how it is going and based on that, give an extra push to your campaign, if necessary as it draws to a close.