As a general rule, I try to stay away from these traffic exchange websites. Years ago when I didn't know what I was doing I used it, but after doing a lot of research I decided not to do it.
I decided it wasn't worth the risk of getting banned, plus I also heard that doing this can potentially bring dead traffic to your channel (subs that never watch your videos, people that watch the first 15 seconds of a video but then click away immediately, etc) which can have it's own negative consequences depending on how the YouTube algorithm uses that data.