KidsCorner
I Love YTtalk
Maybe you didn't apply it correctly, did you keep viewing and commenting on their new uploads? Did you personalize the comments to what was actually in the video? Or did you sub/comment to people/videos outside your niche?Yep, this exact same thing happened to me and I got completely bummed out when I knew this wasn't working and it stressed me so much more than what it should. 293 subs at the moment, and all of them are probably dead ones, except perhaps 20 of them maybe - which is still a long stretch. But well, what can I say - lesson learned!
I have loads of them returning and the retention is okay as well. You do have to spend a massive amount of time on building the relationships though otherwise you have enormous amount of dead subs, no views and no watch time.
You have to understand that you all help each other, if you just come in for the quick sub you'll be disapointed with the result indeed.