Just woke up to Game Theory in my YT subscription feed. Not my home feed. Not suggested videos. So, I checked, and @TeamYouTube automatically subscribed me to Game Theory even though I unsubscribed years ago and haven’t watched their stuff in ages.
Please do not.
This is related to the recent YouTube Gaming subscriptions update: https://twitter.com/TeamYouTube/status/976881000503443462 …. If you don't want to be subscribed to these channels, you can unsub. Hope this info helps!