Indeed, no one wants to pay taxes but the winners will still pay the taxes because they will get a notification from the local tax office about how much they have to pay.
Users really have to ensure that their personal data is safe and not give it to untrusted parties.
The last thing that winners thing about is taxes. The problem is that people get his winnings and spend it for his pleasure and next year tax inspections says him that it is necessary to pay taxes. But person has no money at all and buy such way he can become a buncrupt.
Taxes are important. If they least think of it then it only shows that they have an intention to not pay it but I am sure that many of these people already know that tax evasion is a serious offense and there are certain punishments for it including fine or to pay some amounts and imprisonment.
There might also be players who didn't knew that they are required to pay taxes right after they win big amounts in gambling, most especially if the win happened in crypto gambling. It will be a good idea if the winning amount will be reduced already before arriving in the players account. That way players won't ever forget or evade their obligations on taxes.