Most potential users will want to try out the software or service before committing any time and money. Some products work great by just giving users a free trial, while other apps are best experienced with sample data already in place. Often this is where the age-old demo account comes into play.
However, anyone who has ever implemented a demo account can attest to the problems associated. You know how things run on the Internet: Anyone can enter data (whether it makes sense or not to the product) and there is a good chance that the content added by anonymous users or bots could be offensive to others.