It would be interesting to see karma-per-word, as well, as a kind of succinctness density factor. Although karma points are not equivalent to quality, and you’d need to also factor in average comment length and some other things.
To use myself:
31,273 karma / 351,012 words ≈ 0.0891 karma per word
I aim to avoid it these days, with varying degrees of success. I don't need fictitious internet points, I want to hear other people's genuine thoughts on a subject of interest. Or sometimes just to share something I thought was neat.
But since all social media are Pavlovian conditioning for points, you rarely get any fruitful exchange. And it seems to be getting rarer and rarer, sadly.
I wonder how one would structure social media to avoid it. HN is good, but the karma system is a double edged sword. Would it increase the quality of the discussion to retain the use of points for ranking posts, but hide point counts completely? Perhaps they could be represented by words: "Positive response", "negative response", but only past -3 and +3, with no changes in wording beyond that score?
I do think that pithy is good. The real world also rewards people who can convey an idea succinctly. ("Healthcare for all" for example is an effective rallying cry despite lack of implementation details.)
Politics is not assessed in terms of how the slogans sound, but what they achieve. Universal healthcare is further away today than it was in the '90s, and Democrats are less 'rallied' than ever.