How this affects your affordability score
Lenders want to see you have a predictable income and you're responsible with your finances. The lower percentage of your income you spend on gambling, the better.
If you spend a lot of your income on gambling, lenders may be less sure you'll pay them back. This could impact your eligibility for some credit products.
Maintain your affordability score
Keep what you spend on gambling as low as you can (at least under 10% of your income)