As the discussion came up in Discord again, I was once more reminded that kagi has Lenses. I practically never use them for a simple reason: I don't think about it. I assume there are more features that I (and potentially many other kagi users) are completely unaware of or just read about and forgot. It would be great if kagi could occasionally suggest the usage of features.
A simple example would be the Google-habit of adding "reddit" to the end of the search query if I want to see forum results. Kagi can, at least I assume, do one better and use the forums lens (I say assume here because, as I said, I never use this feature).
So my suggestion would be to nudge the user towards using the forums lens, for example by showing a widget or similar before the first search result, asking the user if he instead wants to try the forums lens.