Sure I can use it for some things, but no one else can. I can't even get an SSL cert for them, or control DNS using an API like I can with Cloudflare (I can setup my own BIND server, but its a lot more work for not much gain).
I can use a gateway like HNS.to to share it with other folks, but thats uglier than a normal domain and bad practice due to shared cookies and the like.