Ok, suddenly the casino you're playing asks you for proof of income to be able to withdraw your winnings and to keep your account in good standing, your bankroll every month is $500 and you provide proof of salary that you are making $500 net every month, will they accept that proof will they accept that you are putting all your salary for gambling, will this violate the principle of gamble for fun, because you are working to gamble based on your proof income.
i will skip gambling sites that force me to do this, for me it is very annoying if a gambling site requires me to give them my salary slip every month just so that i can play and make withdrawals there. remember that you are gambling with your own money, so use it as you please, even spending it is your own right.