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

If you're a developer interested in getting early access to the membership APIs — add, remove, list members—please reply here!