Yeah, it doesn't make sense for the damus relay or whatever, but I do use it for a relay that by design is for a certain type of user, it costs a tiny amount to join, doesn't curate, but it does have certain guidelines for notes. Its more like browsing the notes of a follow list and its great because I want to occasionally see posts from those people, but not follow them all, or have them clutter my main feed.
I don't know if its wise for these relays to use the same interface as a take everything relay, but I don't see the downside, but also, there is no way to really draw a line between the 2.