From the article:

By library, I mean any software that can be run by the user: shared objects, modules, servers, command line utilities, and others. By service, I mean any software which the user can’t run on their own; anything which depends (usually through an API) on a service provider for its functionality.

It looks like the blogger took a page out of Humpty Dumpty’s playbook and tried to repurpose familiar keywords that refer to widely established concepts by assigning them entirely different meanings that are used by no one except the author. I’d also go as far as stating these redefinitions make no sense at all.

Perhaps the blogger might even have a point to make, but stumbling upon these semantics screwups is a major turndown, and in my case led me to just stop reading the blog post on the spot.