Your own repository allows you to store and use all the necessary elements for all your projects. You no longer need to remember what project you are doing with a similar problem and where you saved the desired code. Now it is enough to keep in the proper format your code snippets, modules, plugins, and other elements, and they will always be at your fingertips.
MODX-STORE only stores a link to a package that allows you to store your packages anywhere (GitHub, YandexDisk, Dropbox, etc.). This provides an opportunity to correct or update the package without visiting the site Extras.evolution-cms.com.
Keep only links to your package enables users to ensure the security of information on their own (for an example,you can restrict access to files by IP). Thus, even in case of burglary Extras-Evolution, you can be assured that your information will not fall into the wrong hands.