A creditor or insurer may not pay to an employee of the creditor who participates in the processing of consumer credit transactions any commission or bonus that exceeds an amount equal to 25 percent of the employee’s annual earnings for the sale of insurance in connection with those consumer credit transactions. Insurance does not include a warranty plan for which the commissioner of insurance has issued a limited certificate of authority pursuant to rule promulgated under s. 600.01 (1)
(b) 5.