[f1refly]

> Why would anyone register a domain with such extension is beyond me

Because it's fun? Most sites where probably registered before the war and aren't necessary serious. You can have a good time with a soviet styled website or even community, all with matching url and flags and stuff.

[napalmall]

Unless it is joke or some sort of museum or history website, using Soviet symbols is extremely frowned upon in the countries that used to belong to the union https://en.wikipedia.org/wiki/Bans_on_communist_symbols

[f1refly]

I'm sure that is true and sister reply rightfully pointed out the parallels to the nazi dictatorship. I personally find both rather distasteful, but I think that ironic usage would very well fall in the "joke" territory.