The use case is different for what you are implementing it for so in Twitch’s chat design’s case it may not be needed. Some people may find that a follower badge would be nice and some may not. The same could be said with the subscriber and prime badge. However, tags that may not seem bloating to Twitch’s chat design may be bloated data for third party developer’s applications which don’t use Twitch’s chat. In this case half the tags could be considered bloated data.
A solution for this would be for Twitch to allow developers to make a request to receive certain tags that may be more suitable for them and their application. This would allow Twitch’s chat to continue receiving the tags needed for their chat design and accommodate developers needs. This would also allow for a wider range of tags to be implemented seeing how developers can simply request what they may want or need.