It depends. If someone makes a quick "Love this post!" comment, I might do just one "thank-you" clap. But I might clap more if someone makes an unusually perceptive or thoughtful comment: for example, if the person says something that I wanted to say but omitted for lack of space or that draws others into the conversation. I'd never clap for a troll, but I might clap for someone who disagreed with me in a respectful way, just to show my appreciation for polite and civilized dissent. Like you, I'm still feeling my way here, so any of this could change as I figure out what works and doesn't on Medium. Thanks for asking!