This may be related to a recent YouTube Gaming subscription update, the full announcement is here: https://goo.gl/zfgfC4 . Let us know if this doesn't seem like your issue or if you're unfamiliar with YouTube Gaming.
@TeamYouTube @pewdiepie Youtube has been sneakily making me subscribe to channels I unsubscribed long ago without my consent, is this only me or something that s happened to other people too?
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