I think the discussion is basically over, there have been some people who open new accounts and bet the exact same way, if they lose they go away and make another one and if they win they still go away and make a new one, this causes some accounts to look like they have bet once and won big and leave whereas in reality it is actually plenty of accounts with wins and losses that probably cover each other if you calculate. That has been established already and OP only figured out the winning ones so he thought to himself maybe this is another hack but as plenty of reasons pointed out how it can't be a hack resulted with not even OP trying to counter argue with the points given about it.
We can even lock this topic up and move on because the answer is very clear on what happened with those accounts.
Or maybe he wasnt able to see some big wins on his entire life?
thats why when he saw these accounts having small number of bets and big wins he do already
accuses that the site isnt doing something or some shady stuffs do happen.
Multiple accounts can happen anytime and having similar way of betting can be seen but theres no issues with that as long they arent violating or making shady behavior there should no be issue but Op seems like to have that investigative way of thinking.hehe