New level structure and details

① Level 1: No minimum number of customers. Up to 30% commission on first purchases by new customers.

② Level 2: At least 3 valid new customers. Up to 35% commission on first purchases by new customers.

③ Level 3: At least 10 valid new customers. Up to 40% commission on first purchases by new customers.

④ Level 4: At least 30 valid new customers. Up to 45% commission on first purchases by new customers.