A 65% affiliate commission from CapitalKing.co is considered high. You should compare it with other programs in the same industry. Many affiliate programs offer commissions between 5% to 50%. You may find 65% to be above average in some niches. You should consider the type of products or services you are promoting. Higher commissions can be attractive but may also come with lower conversions. You must analyze if the higher commission compensates for a smaller customer base or lower sales volume. You should weigh the benefits of a higher commission against other factors like conversion rates and product pricing.