Name the advantage this player had
Of course players have advantage if they are abusing bonuses, this player didnt take any bonuses, he didnt circumvent limits, so explain.
You are stuck in your position unwilling to act in good faith because you likely cant pay winners.
Don't come here acting like we're the only online casino that doesn't allow multiple accounts, this player broke our T&C.
Other casinos that do not allow multiple accounts
Stake ->
https://stake.com/policies/termsNitrobetting ->
https://nitrobetting.eu/terms-conditions/ (Limits and restrictions)
Fortunejack ->
https://fortunejack.com/faq/terms_and_conditionsAnd many more, go to your favorite casino and read the terms and conditions
YOU ARE NOT ALLOW TO HAVE MULTIPLE ACCOUNTS