Users can subscribe to a Mouser newsletter. There are several different mobile applications that allow people to subscribe and listen to podcasts. Users create topics to which other users can subscribe. But I don't subscribe to this. Few nowadays would subscribe to this view. Let people know that I subscribe to their views. Any user is able to create and subscribe to channels. This is called a publish/subscribe model. Other asynchronous examples exist in event notification systems and publish/subscribe systems. Users who do not subscribe to Spotify Premium hear location-targeted adverts. I still subscribe to that sentiment. Users can also subscribe to a RealNetworks service called GamePass. Web Slices are snippets of the entire page to which a user can subscribe. And to those who subscribe to more than three film magazines. All systems that depend on an event subscribe to it.