Currently, public sub counts are abbreviated in most but not all places across YouTube. In August, we’ll make this more consistent by always showing abbreviated sub counts publicly. Creators: You’ll still see your full sub count in Studio! Learn more → http://yt.be/help/abbrev-count …pic.twitter.com/pmaKk4EU4k
After a quick look it would appear that you have a lot of material on your channel that violates copyright. You also have tags that are improper. YouTube is getting very strict about original content so that also plays a factor because a lot of your videos are Reddit posts.