Purple is a DAO whose goal is to proliferate and expand the Farcaster protocol and ecosystem. 

https://purple.construction/

How could @purple help grow weekly active casters?

Are there public waitlists for people to join who hear/know about farcaster?

Not that I'm aware of. Maybe this is something Purple could fund.

there seems to be a common disconnect between those who have invites <=> those who need invites, centralizing that could be useful

Agreed. I have invites and would gladly share them to potential users

same. and just saw your comment in the other thread about invites...one thing I think is a good property of waitlists is that the expectation isn't immediate invite. very public/open waitlist seems like it would be pretty good just to build demand