Blizzard has updated the eligible creators for the Support a Streamer event starting with Dragonflight launch adding new eligible streams. Players can gift subscriptions to these creators to earn the Ichabod pet.
UPDATED NOV 28: Updated list of eligible Twitch channels. World of Warcraft is partnering with Twitch to host Support a Streamer during the launch of Dragonflight! Twitch viewers will be rewarded for gifting subscriptions to participating streamers.