I've posted on hacker news (avg 5-15 page views), Reddit (avg 2-5 page views) and Quora (no pages views that can be tracked anyway). Most of my Product hunt launches are completely dead, getting almost 0 traffic, although there was 1 that got 200 upvotes and nearly 400 page views). It's darn near impossible to get a steady stream of traffic unless Google decides to give it to you. It seems like, Most success stories…
In the long run, about half the downloads came from google searches. One trick is to completely forget about branding. E.g. if you wanted to promote a habit building app, just call it "Habit building", not "Habitly" or some custom name.
We were on 5 newspapers and several blogs. Nobody reads newspapers, and they brought us about 3% of traffic. However, about 10% of our total traffic (and about 90% early on), came from people linking newspaper articles. Blogs, one of our suppliers, Facebook groups.
HN, Reddit, Quora actually seem terrible direct ways to get traffic, but awesome indirect ways for it. You can't actually shill yourself, someone else has to do it for you.