Here are some of the use cases for a sticky link
Point your QR codes to a sticky link and you will never have to worry about a shared QR code that points to a dead link or old URL
Now you can use a single sticky link for all upcoming events. The tickets page for example may be different for each upcoming concert event
Use sticky links to add to your articles and never have to worry about re-editing your articles again because of changed URLs
Most products come with printed manuals. Having dead links in printed documents is inconvenient. Use a sticky link instead
Inspect the source code of any website and you will find many URLs to external javascript and CSS. This is a good use for sticky links
Sticky email address that you can point to any other email address, and change it when you like