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
but why tho. i really can't think of a reason why this needs to be implemented. if you have time to make and implement these kinds of ideas, why don't you use that time to fix your website? just saying.