I'm not willing to do this from a work network, but if you search the wayback machine [1] you can probably find when /r/nsfw disappeared following the Condé Nas

I'm not willing to do this from a work network, but if you search the wayback machine [1] you can probably find when /r/nsfw disappeared following the Condé Nast purchase; and then look around that time for a thread about reddit management where some user complains about it disappearing. [1] you could try reddit search if you are feeling lucky or masochistic. Or maybe it's really good at binary date searches and I just don't know how to use it.