If you have a project team, and other people on the team are using the component in their part of the project then each person that compiles with the DCU or source should also purchase a copy. You also get all updates to the component for a period of a year at no additional charge. During the past year that gave all registered users a number of intermediate updates plus the 32 bit version at no additional charge. If you do not then we stop answering your questions and sending you updates. You also get Technical support for a year.
Technical support is provided by e-mail, and fax.