Sub 4 Sub hurts or helps channel

[Maxemole]

Sub 4 sub is like, one of the things you should never do. Ever. It always ends with poor engagement and YouTube doesn't like that.

 

[Pro Kie]

Sub 4 Sub definetly hurts channels as you'll have all these subscribers but no views

 

[Dutchie Abroad]

I think I might have linked my article here before, but since we have a fair few new members:

Why Sub for Sub hurts your channel

Everyone has been there. You look at your subscriber amount and it just won't budge. But you really want to reach that 100, 500, 1000 subscriber count! And then the notification comes in. "Hey cool channel, I'll sub to you if you sub me back." And you think "Cool. Another sub, just what I...

yttalk.com

I wrote a comprehensive explanation about this