No and yes. Most people don't like karma farming and all that stuff. So I think the "Karma" value is absent from the regular user interface. Instead it shows how long you've been here and how many posts and comments you made. But at the same time some other software calculates your "Karma" value, I think some phone apps display it as well. And some moderation tools factor in votes on a user. So a clear yes and no. But there isn't any Karma competition here.