Thanks for posting this. I hadn’t heard of Plus Codes before. Still not as elegant as W3Ws.
I do find it quite elegant, but there’s no reason why someone couldn’t riff on these ideas in a way that was more elegant. We remember words better than random letters. I’m sure someone could generate short phrases that map to a similar grid. Might also be able to deal with things like elevation (what floor of the building are you on).
It is totally worth while getting compensation for the work that you’ve done to push out an idea, but on the other hand if it is going to be used as an essential service then releasing the algorithm is critical. You have to engage the locations independently from the W3Ws service.