User blog comment:B214/Question and Answers 6/@comment-24098614-20170330202422/@comment-30924344-20170330211111

They were banned because they used a King Piece, a piece which increases one's power 100 fold and the user does not die if they are not already too strong, so the cheaters were weak to start off and then they used the piece to become 100x stronger and gain their positions in the Rating Game. They were banned because of that danger before the Rating Game thrived and so because those 6 devils used one, it's cheating because they did not go through hard work to earn their ranks and skipped there using an outside source.