I used to think it was .onion. I owned my .onion domains in the sense than only I had the private key that corresponded to the hash that was my brute forced vanity domain. I thought that meant I had control over them. I was wrong.

It turns out that even in p2p networks if there's one one dominant development group then that group owns your domains. The Tor Project decided that tor v2, with all it's potential exploits, could not exist alongside tor v3 and so all the tor v2 domains will disappear to the official tor clients this october 26th.

I don't own my .onions so I won't be making v3 sites.