Being a moderator of a pretty big channel is nice because I see so many new people here, but my DCs are FULL of people asking for membership who won't provide value and will spam. 

fc-updates

Channel update: public mode is now live

- Public mode allows non-members to cast in the channel

- Member casts always appear in the channel feed; non-member casts will sometimes appear in the channel feed

- You can always make someone a member of your channel to guarantee they appear in the main feed

- Channel owners have the option to turn on / off public mode

/farcaster and /warpcast are now in public mode

Try turning on public mode?

https://warpcast.com/dwr.eth/0x2e63da67

Have you created a step in the community onboarding process that requires them to get to know the community and provide something of value?