The short name quota applies to every time a user changes the short name of a link that has previously been changed (not including changing from a generated name to a custom name). The quota will be available again after the date of resetting the quota or upgrading to a higher service.
now you can change the destination address or original link from your shortlink. This only applies to Starter services with 3 quotas changes per month.
Archive Links is a feature in the link shortener to archive links, links that are automatically archived cannot be accessed by other users (links go to 404 Not found).