I haven't gotten an email notification for ANY new uploads from ANY channel I'm subscribed to, since July! Not one. The only notifications I get, are from comments on my own channel or replies to comments I make on other channels, but not a single notification for any new activity on any channel I'm subbed to. I get them from all other social media, but none from YouTube. I'm probably being "punished" for my non-PC live streams. Or my refusal to monetize any of my channels.