I would lay off if I saw my comments get downvoted, but they always get upvoted (many times to the top). Many people reply that they've never heard of it and eager to try it out. I never spam, I always reply to comments/submissions that have direct relevance to my app. Either when speaking about the same category (note-taking apps) or discussing different GUI frameworks. Plus, the quite large influx of people signing up for the wait list shows me it's a net positive.

EDIT: I see people have been downvoting the parent comment since you posted this, so I'm getting the hint. Thanks for letting me know, everybody. I'll comment less frequently in that manner.