First thing I do every morning is spend at least a half hour replying to comments in my notifications. I’ll comment on answers I read during the day, when something strikes my fancy; maybe a dozen a day? Maybe 20? I should count some time.
I use Quora sociably. Not to the exclusion of my intellectualising, and often as a supplement for my intellectualising—I often have quite good intellectual to-and-fro. I also have lots of good banter. Commenting is a core part of my Quora experience. And not just mine.