Warpcast

i'm sure it's been talked about many times over already in /warpcast, but if you'd humor me, is there a reason why a channel `member` doesn't necessarily have to be a channel `follower`? i get why there can be a distinction between `member` and `follower`, but shouldn't a `member` have to be a `follower`?

cc @luso

building /quidli 🦑 & /dist ♻️, casting in /justinahn, daoing in /🍊 & /🟪

btw, i can't cast this directly in /warpcast where i think this belongs because i'm not a `member` of the channel 😭