Do not let the existence of this site stop you - in fact, let it motivate you. There’s a gap in the market at the moment. Not counting this rather odd offering that I don’t really see gaining much ground, Neorings is gone and Melonland’s guilds are tied to their forums, so as far as I know webri.ng is the only open, active webring network and it lacks basic features such as skip mode and custom links - running a large webring on webri.ng can be a bit of a pain. So a full-featured webring provider would be quite popular, I think.
I’ve considered taking my own webring code and making something like that, but I have zero experience with stuff like accounts and passwords and all that jazz - so it’s still on my list of ideas, too.