Aspirational headline, but generally good advice.<p>One possible dispute would be the "get ramen profitable first" point. There's a strong case to be made for taking money pre-revenue, before your metrics get harder to defend.
I would also argue that PPC can be used extremely early for A/B testing landing pages (and other testing uses), as well as, for customer acquisition if your product has the right market fit (cost per acquisition less than profit per sale).