It's a "universal shortener".[2]
You can take any block of text and condense it to a simple code that you can chalk up anywhere. It's the same idea as a QR code but you can just quickly write it out with a pencil or chalk it on the street ... or verbally state it.
I'm convinced there is some use-case that this elegantly solves and would be genuinely valuable to people ... but beyond mentioning it here on HN I have never marketed it in any way.
[1] https://0x.co
But seriously ...
We did, in fact, disable certain outputs but they were all related to legibility and mistaken transcription. For instance, no O/0 and no l/1, if I remember correctly ...
Maybe a superbowl commercial ...
It says: "Website blocked due to phishing"
The idea is that they come into such broad usage that everyone just knows what an 0x code is.
It made me happy to build it and I hope that there is some emergent use-case for it that organically comes into being.
Surprise me :)