I've never heard of what3words before now and read up on their site. It's a fun idea but I wouldn't say its invention or even novel, just convenient. I'm not surprised they're relying on litigation to try and fend off competitors.
Where in relation to curve.empty.buzz is grape.trunk.gossip? Is it closer/farther than slurs.this.shark?
The first is about 6 feet north. The second is 3600 miles east.
It's an almost intentionally terrible system designed for people to be reliant on their services.