You’ve been able to subscribe to non-Amazon services, like Sling TV, through Amazon for some time, but now they’re opening the marketplace to a wider array of digital service providers. The new “Subscribe with Amazon” marketplace is available for any developer with an app to join and facilitate subscriptions through Amazon. The app itself does not need to be on an Amazon device.
Service providers can offer introductory, monthly, and annual pricing with the option for free-trials. Amazon also says there will be Prime exclusive deals in the marketplace, that providers can take advantage of. The marketplace is currently limited to digital products, but you can easily see how this can expand to physical subscriptions.