this may not be directly helpful to this post, but the most confusing things about how most clients handle relays are the following:

- where did this client get these relays from? my profile somehow? my browser extension? its own hardcoding? discovered from my follows?

- if i change them here and now, will that stick? will it only be for this client or will the change follow me around?

- what is the nature of each "type" of relay category?

- and again because its both important and confusing: if i change the settings on this screen am i overwriting settings for my profile in such a way that other clients will reflect it, or is it just local to this one?!

lack of understanding of this last point is part of the reason people get frustrated about having different experiences in different clients