So many good points…

First:
nostr is small. It will either stay small or it will grow. I imagine the latter is the zeitgeist, so the question is … How to keep bots and bad actors at bay in a (scaled-up) decentralized “no sherif in town”  social network? Webs of Trust is the “popular” answer, but the challenge remains … how to weave new accounts directly into webs of trust, and avoid the “din of spam and propaganda” that is sure to be the dominant background noise of Nostr? 

“Social onboarding” is the answer I propose. 

Because WE are the dedicated few who are equipped to succeed in such a task, YOU are actually the ONLY and the BEST person to ask.  

 Second:

I’m attempting to answer two questions in this algo flow: 

1) how to quantify “social onboarding” so we can measure its success (in terms of higher retention rates?)

2) how to discover the “nostr advocates” who are doing all this good work?

Given the value statement for “social onboarding” stated above … these are still valid questions to ask, regardless of how the “incentives and rewards” play out.  

 "I'm seeking an investor with a mission to invest in dreams and projects to change the world for a better future. I plan to initially invest $5 million in my well-being to improve my quality of life and focus on the project. Additionally, an additional $3 million will be invested, totaling an initial investment of $8 million. Of these, $3 million will be dedicated entirely to the project for the development of a cheap and accessible framework, including the development of a mechanical skeleton to help people walk, mechanical robots, and other utilities. I guarantee to deliver the prototype within 2 years, with additional support from the investor."