The loan money is not the correct source for the gambling game,the gambler should allot the separate source of the income from the salary like 10-30% of their salary to their own games in the gambling site.
Only an addicted gambler can take a loan to gamble because he is moved by feelings and not his brain. When a gambler uses a loan to gamble he is risking funds that are not his. Whether he loses or not, he will have to pay the original loan amount and the interest accrued to the loan which is a double jeopardy and can exacerbate his financial burden. Using a loan to gamble is even a reflection of poor financial decision-making.
In my opinion, 10-30% of a gambler`s income is still high. 1-5% is preferable and that should be after covering expenses, savings and other important financial commitments. This will help to guide against excessive loss that can be detrimental to the gambler.