The way communities are setup is basically like more moderated "new" feed. It is not a huge time investment to be a part of the team, you click upvote and comment if you like. If you ever wish to become admin or mod just say it. I think this will become a fun new part of Steem experience.

Scalability will be one of the big issues for sure, but not next year I think, next year will just turn some heads when they realize the potential to earn while playing games like never before. True scalability issues will come years after.