That was exactly what I was thinking. People (and I'm 100% guilty of it too) see a video that actually catches their eye, and in a vacuum looks like a channel you might want to come back to again, and subscribe to it. Then, the channel sucks bawls, and you skip right past every video you see from it on your subscriptions/suggestions pages and never go back. I had to go through and clean out my subscriptions the other day because I literally had something like 200 channels I had subscribed to, probably 125 of which I never actually watch.
I have a bad habit of subscribing to channels that I DO like, but that begin with the word "The" for some reason (YouTubers please do not start your channel name with "The"), and it was taking far too long to scroll down through the alphabet to get to "T"... LOL