By following these steps, you can create a feed (and corresponding packages) that is cloud-hosted and publicly accessible to anyone in the world who has internet and knows your feed URI.
Create an account on the Amazon S3 website. Note: Right now (Sept 2018), Amazon allows you to try this out by using the Free Tier for the first 12 months. This may or may not change in the future. See Amazon S3 pricing here.
To access this feed and its packages on a target computer, you just need to register the above feed URL in NIPM. You can do this manually in the NIPM GUI or programmatically using the NIPM API. Now the target computer (or any computer in the world that has internet access and knows your feed URL) can view and install the packages in your feed that's hosted on Amazon S3.
Note: If you want to programmatically interact with your Amazon S3 bucket/files, you can use the free LabVIEW Cloud Toolkit for Amazon S3, which supports LabVIEW 2014 or later. Install it directly from VIPM or from this website.