We're launching spam filtering in Warpcast. 

If a conversation has spammy replies, they'll be hidden and you'll see a "Show more replies" button. Tapping this shows you the hidden replies. 

This is now the default experience if you have Priority mode switched off.

I had incorrectly stated this feature was shipping for Priority Mode users.

That was incorrect. We're going to start with users who have priority mode off, and once the spam model improves, roll it out more widely.

If you want to try it out, turn off Priority mode in Settings > Casts & Users