Copying from my other post to expand. "Allowing multiple people to play on accounts that are supposed to be competing against each other is so antithetical to competitive gaming. Splinterlands will never be taken seriously as a competitive game if a leaderboard is filled with the same people running multiple accounts."

Even if it's hard to enforce, the perception is extremely important here. Right now we are literally broadcasting on the leaderboard that a small group of players is running it. People hate competing against that, especially knowing it gives those players an advantage since they don't play against themselves.

Making it against the TOS would stop a lot of it and would help mask the rest, improving player sentiment and the perception of the game.