Twitch adds more emote slots for Affiliates, Partners
Twitch partners start with six emote slots, but that number can increase up to 60 as they earn more subscribers. Once you've unlocked an emote slot, you get to keep it forever, even if you lose subscribers.
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Twitch guarantees you one sub emote slot if you're an Affiliate, with up to five unlockable slots in total. Partners receive six automatic slots and can unlock up to 60 emote slots overall.
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Before contacting Twitch support, ensure the streamer you’re watching has the same emote extensions as you and see which emotes they selected for use in chat.