We are living through the emergence of a new business category which I believe will become an important part of our digital lives: community-curated knowledge networks  (a thread on why) https://t.co/ZNg3FHiGUD

Payments and built-in monetization models – Just as ads have become the predominant monetization model for social platforms, we believe member subscriptions are promising for communities. Because people are more likely to consume a product when they pay for it, subscriptions can incentivize engagement.

When the niche is narrow enough, you need very few people to make this kind of community network effect work.