The original post doesn't claim they didn't do marketing. In fact, the first sentence in the post is "Short answer: great product, some marketing and a bit of luck.".
The whole quote about "without any marketing is" is:
Pipedrive could have grown to 10,000 paying customers without any marketing: by describing it as "it's a piece of sales software" on an uncrawlable site without any design, without onboarding emails, without press mentions, without a single ad and blog post.
I took that as the author using hyperbole to critique how "enterprise" sales systems work by literally just existing.
The whole quote about "without any marketing is" is:
Pipedrive could have grown to 10,000 paying customers without any marketing: by describing it as "it's a piece of sales software" on an uncrawlable site without any design, without onboarding emails, without press mentions, without a single ad and blog post.
I took that as the author using hyperbole to critique how "enterprise" sales systems work by literally just existing.