How come the Youtube subscription module is so TERRIBLE?

Im actually kinda aggravated with this but on my insight it shows that only 2% of my viewers on Youtube come from the subscription module. I don't do sub4sub so all of my subscribers are legit but I have 895 and I barely can push 200 views that means only 17 out of 895 click on my videos from subscriptions I really doubt I have 878 inactive subscribers so whats going on!?