[jancsika]

I think there's a law in there somewhere...

Suppose you had met the original author at the very beginning of the project and convinced them that marketing/growth/etc. is important. Let's suppose they only write some single facile sentence in the README about, "marketers/growth experts welcome" in response.

I would hold that just having that single, facile sentence buried in the README from the outset is more powerful and persuasive to the project's developer base than the most detailed proposal that a marketing/growth expert could possibly write after the fact.

Maybe another way to say this: if you showed up to a consumer OSS product that had this facile sentence in it there, the entire developer base would welcome you make a marketing pitch to them. Without it, they would interpret it as noise.