Offering a special promotion/discount is a great way to encourage new business and further establish a project.  However, like many things, doing it in excess can produce unfavorable results.  Firstly, having a discount offer too often will deplete its effectiveness.  If something is too common or predictable, it’s no longer special, and has little meaning.  However, more importantly, offering excessive or regular discounts makes a company seem desperate.  Whether it is true or not, the perception is very damaging for business, and can lead to numerous problems and revenue loss.  It can even result in customers believing that you are charging too much to begin with.  One tip is to offer a special promotion over a longer period of time rather than repeating it.  After that period, do not duplicate the discount in the immediate future.