0.2 %is quite significant, isn't it? My small website (www.makonea.com) gets about 90,000 visitors a month on average. (That's about 300 per day?) So that means a post gets shared about once every two days. Maybe I should seriously consider making my posts more shareable. And if I promote it on HN, I'd hope there's a 0.2 %chance that people would check out my site.

Imagine what buying high value visitors costs. 10 bucks is nothing to gain one person who is actually interested. At least 300 free money right there