Betfury already has the system to minimize the abused it especially for FunFury competitions, players can only win this competition 7 times regardless of your rank even though you are not at number 1 but if you are already included in the leaderboards then you are already counted as a winner because you get prizes and are limited to 7 times, here is the details
https://betfury.io/promo/battles?modal=FunFuryCompetitionWhat if someone opens a brand new account just for this, in fact they could open 10 accounts at the same time, let them mature, and use them one by one until they reach 7 wins and then move to next one? And start a new one when the old one finishes, that way they would always have 10 accounts to use whenever needed. Abuse is always there, it is very hard to not get abused as a casino, it would be very tough for them to not get abused.
In order to do that, pre-arranged stuff won't work, they have to be manually checking every single winner and make sure that they are not cheaters, otherwise they would be pretty upset when they find out what happened.