You're the first one to mention external promotion, like sharing on Twitter, Facebook and Medium.
Do you have an idea if you're actually reaching people doing that?
(I do it myself, sharing on other platforms - on a lot more than those three. But the main idea about it is SEO-related: the more backlinks the better. I have never actually paid attention to whether this actually brings in visitors.)
RE: [STEEM-BOUNTY] are You Actively Promoting Your SteemIt Posts?