Ironically, you have missed the point of the blog post. It wasn't written to market the service, nor to engage those who aren't engaged right now. Your comment sounds like it was written by a marketoid or a growth hacker.
I've tainted the Jesus of bookmarks by even implicitly suggesting in my post that they might be writing with the intention to be read. No, I suppose their intention is way more cosmic and godly than such low earthly concerns, how stupid of me.
Aight, aight. I never stop learning when I'm here on HN.
What does this tell you?