Upcoming channel changes

We're *previewing* some upcoming changes so people 1) can understand and 2) provide feedback.

These changes are not launching yet. It will be a couple weeks. There will also be a bunch of communication to channel owners. 

After reading the entire doc, feel free to reply to with feedback or send me a DC. I've tried to answer a lot of common questions in the FAQ.

https://warpcast.notion.site/Upcoming-channel-changes-1056a6c0c101800caee6ea8133f8f966

The simplest version of making your channel membership more open will be through a frame.

1. Pin the frame as the top cast in your channel

2. A user who isn't a member can click on the frame

3. Frame calls relevant APIs — token-gating, spam filtering, etc. — and the immediately invites any qualifying user to the channel.

4. So while there won't be a formal "request to join channel" built-in to Warpcast, the design allows for any developer to build channel gating software on day 1. 

5. This can also be used in conjunction with other moderation software (since we will now allow up to 10 moderators per channel). Use one tool for membership gating and another content moderation (if that's what you want to do), and use the other 8 moderation slots for people heavily invested in your community.

Ok this cast makes me feel a bit better about this whole thing.