Fortnite leaderboards

There is this thing on fortnite called mobile lobbies, if you go look at the seasonal squad leaderboards you will see they have 102 matches played with 100 wins and they have a 200 kd, what they are doing is getting two people in a lobby then inviting there accounts and the phone and then they get a AI lobby it’s rediculous and there other account already got banned from fortnite tracker for playing mobile lobbies so technically they are banned