I've been pretty consistent watching streams, but have not gotten a crate - on either account - since the 16th.
Update: From several sources, it appears that Twitch Premium containers for watching WoWS streams has ended due to the total awarded hitting a hard cap. Twitch Supercontainers are still a thing, though awarded in-stream only. And "Space Drops" (the ones with Ironium) also seem to have hit a cap.
Update 2: Twitch drops seem to have resumed as of 4/23.
Update 3: See below, No more drops.