Using the API allows you to have a direct method of exporting your data without having to upgrade to Professional (which allows you to export data automatically). Similarly, you can use the API to retrieve ticket data for reporting purposes. The API can return all the information associated with the ticket, so you can use the API output to send the data to a third-party reporting application.
Although you can only create one organization at a time in the agent interface, you can create up to 100 organizations at once using the API. The simple interface allows you to edit 60 tickets at once, while the API allows up to 100 tickets.