Subscriber are just that. Subscribers. They hit that button because they want to keep up with that creator's content without having to manually check the page every goddamn waking day. With the lack of notifications, what is the fucking point?
even then sometimes videos wont always show up on the subscription feed like for example i didn't even see when your okami review went up either on my email or the feed i had to actively check your page just to make sure if it was up or not. @TeamYouTube fix your shit man.