I have seen this in distant times as well. The one I remember most provided a link to view your opt-in choices. Clicking on it showed what the "minimal" cookies

I have seen this in distant times as well. The one I remember most provided a link to view your opt-in choices. Clicking on it showed what the "minimal" cookies were, that actually did affect how the page worked, or fed other "features" that were non-tracking, and what ones were not included so that you could opt in to some things if you were interested in them (which I'm sure was always never). I thought it was clever and unusually honest.