Sign up on Slice using referral code FREE150, complete KYC, check Credit Card eligibility, and use special invite code LUNA21QA if you're on the waitlist. Complete your first eligible UPI credit card transaction to earn up to ₹500 cashback. Steps: 1.Download the Slice app using the referral link below. 2.Register and complete KYC. 3.During signup, enter referral code FREE150. 4.Open the Credit Card section. 5.If you see a waitlist or no offer, enter special invite code LUNA21QA. 6.Once approved, activate the Slice UPI Credit Card. 7.Complete your first eligible UPI Credit Card payment to qualify for the cashback reward. One currently documented welcome offer requires 2 UPI payments of ₹250 or more each using the Slice Credit Card to unlock the reward. Users should verify the exact offer shown in their app before making transactions.