oh wow you actually tried out https://girl.technology!! first of all thank you I thought no one would notice it (and I haven't exactly been good about promoting it either lol)
My initial conception was exactly that: https://wolf.girl.technology/ would simply contain a collection of links that people self-selected into by (1) putting a special file on their website and (2) registering with the service. But it was getting a little lonely when I was the only link in that category, so to put it to better use I changed it to be a redirect. This had the consequence of only allowing one link per subdomain, making them act more like usernames than like categories.
I'm not sure I'll change it back, since I do enjoy the vanity redirect & don't expect it to ever get popular enough that name space becomes an issue. Sorry for stealing "wolf" from u!
