Since it’s a prefix, there are many situations where you can use it in places that support proxy servers, such as link resolvers. The only caveat is that some resources aren’t compatible with the redirector. However, the good news is that an ever-increasing number of resources are. These are known as ‘redirectable’ when discussing the redirector. It is these resources that are best to use with link resolvers as the user is taken to the specified target page. For a resource to be redirectable it must support WAYFless access and deep linking (sometimes called article level linking). There a few ways to identify if a resource is compatible, which you can find out here.