Yep network and quality content is the best way of getting subscribers. I see, however, some Youtubers recomend sub4sub in the beginning just to get your channel "started". I did it in the beginning but as you will find out it is pretty much worthless cause you will get no or very few viewsI believe it comes down how you network, get your channel out there and the quality of videos on your channel.
I am trying youtube now and with an older channel I grew 700 subs in 3 weeks but with this channel in the first 7 days of this channel being up I only got around 2-3 subs. Any Tips or strategies to get get a first initial boost?