To find your first customers, do sales not marketing
blog.louisnicholls.com
blog.louisnicholls.com
Plus "buy my book to learn more" didn't work for me. I'm a founder. Just saying.
I'm arguing that you can find product-market fit faster by doing sales than marketing, because doing sales allows you to gather more (and more useful) information from your target audience faster than marketing does (binary yes/no responses).
Sales is asking questions; Marketing is talking.
This is a bit of a tautology to be sure, but the article is correct.