Another thing to consider is that most people on this site will only vote for the stuff they like, but without the vast diversity of content seen on sites like Youtube, some people just don't vote on things at all. I could just upvote random videos on D-Tube just for the STEEM, but I didn't come here for the money. I also haven't seen anything on either Steemit or D-Tube that I feel deserves my vote yet. Without people making new kinds of videos or posts to reach a wider audience, the system's resources become concentrated in the hands of the people that found content they like or bots they like.