A rule of thumb is 1 point = 100 visits while your post is on the Hacker News front page (unless it goes viral and gets posted to other websites, in which case it becomes a lot higher). Your post received about 3,000 visits Friday, 3,000 visits Saturday, so that fits.
I'm surprised how well the rule of thumb fit - they got ~6,800 views and 68 upvotes as they said in the post.