As a matter of fact, Premium Account does not credit you 30% cashback of your order, but increases the base rate by 30%.
For example, if the base cashback rate of Lamoda store is 5%, taking into consideration your Premium Account, you will earn 5% + 1,5% (30% of 5) =6,5%.
As much as we want to, we cannot provide you a 30% reimbursement, as we do not receive such a big commission from the retailers.