I was disappointed to see that this was really a list of things that haven’t really worked out well for the author.
As someone who’s having a hard time gaining lots of new users for my service[1], I was really looking forward to some actual lessons in what’s worked. I checked out the Case Studies, but the content wasn’t anything new or particularly relevant to the scrappy startup situation. I think the most useful content on Grow/Hack right now is this post with actual lessons learned in growth hacking: https://news.ycombinator.com/item?id=4603640
[1] It would be remiss of me not to mention it: Iron Money https://ironmoney.com/