You have invested a lot of your time and effort into developing your Joomla modules, components and templates . If you choose to share your work with others, that is your choice. However, if you desire to sell or offer subscriptions to your work, you will need a secure environment and system for achieving this goal. Joomla! Secure Extensions is the place to achieve this. It doesn't make sense to have your work stolen by a few unscrupulous webmasters.