I wrote a post on why you should start a paid newsletter (https://indiemailer.com/read/why-you-should-start-a-paid-newsletter/) and submitted it to hacker news. Within about an hour it hit the front page and stuck there for almost a full day.
The weekends aren't the best time for traffic, but I was itching to get some feedback on the idea early.
This resulted in around 4,000 visits and ~200 requests to be invited to the IndieMailer slack community. :)