It wasn't random. I know exactly what I did. One day I had an epiphany to how I could use google plus to my advantage. No one else had thought of this at the time. Still, not many people have. And I've been growing since the summer. I started with about 650 subs, 20k+ views on youtube and like 10 followers and 3k+ views on google plus.
I tried to make a thread on how I did it when I only had 2k but not very many people took my advice. One guy did and he went from 23 subs to 500+ subs over the summer. One of my friends was also on yttalk that went from 0 to 940 subs but still, people don't want to listen. It really works.