@jonty An acquaintance of mine designed and built a comparable system to W3W - what3fucks. It worked well and, as you might imagine, was built on a dictionary of profanity. The W3W sent their lawyers into no-sense-of-humour mode.
W3W is proprietary. Which is fine. What's *not* cool is when a government adopts that proprietary system for addressing and so it's locked up in so many ways.
@marcusjenkins @jonty Looking at you Ireland and our Eircodes!