@TeamYouTube Hi, I'm pretty sure I've been getting auto-subscribed to certain channels I never heard of.
(The first 3 in my subscriptions)pic.twitter.com/AHzVNFVJUx
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Thanks for reaching out. Third party extensions may subscribe you to channels without your permission. Have you tried disabling them on your browser to see if that helps fix this issue? Here's more info: https://goo.gl/zv4e4E . Let us know.