It is just amazing how people will spend so much time, effort and money on marketing their web sites and then totally neglect to allocate any time to its improvement and maintenance.
They will hardly take the time to improve on the content and design. Many times they will not bother to ask themselves how long a visitor is bound to spend at their site, once they are there. All these are critical issues that are even more important than the actual marketing of the site. The reason is simple. It is useless to drive traffic to your web site if most of the visitors will end up hitting the 'back' button the minute they set eyes on your site.