Getting 10 subs in a day is tough when you are brand new. I've been working at this for a while now and I just hit 45 tonight.
Some suggestions:
Improve the audio, the fan in the background blowing on the mic is quite bothersome.
Talk more, there is way too much silence in your videos. Also having the game sound recorded would be a great thing to have along with the commentary and like MrWaffler said, become more interactive with the viewers. Talk in your videos like you are talking to someone else online, it makes viewers feel like they are a part of the video as well.
Hope this helps.
~Cyberkilla