They do nothing for the ladder except make it worse for everyone else. Why are they allowed to smurf, stomp, and try to advertise their shitty stream while Riot just looks the other way? What's the difference between smurfing (especially in a duo) and elo boosting? I know this is going to be downvoted, because people like to believe there's nothing wrong because they "learn from the stream", but I ask you again, what's the difference between smurfing and elo boosting? All it does is support people who buy accounts, ruin games, and just removes a sense of competition from the ladder.