W3W is an atrocious waste of space and effort. A couple of years ago I was developing a gis/location system for emergency services and, very briefly, looked at their offering alongside a wide range of tools and methods. It fell down on every point, especially that of having multiple ways to describe a single location, and that of having no inherent indication of distance between two points. The very randomness of the wordlist makes it impossible, indeed it also requires a live connection at all times which is frequently unavailable or of low bandwidth in the field. A service which has no unique usecase.