Available only to selected U.S.-based accounts for participants age 18 or older. A first-time U.S. user must use the custom link, install the desktop extension or Safari iOS browser extension with full permissions, verify a unique email address, and regularly use the extension for 90 days. Both eligible users receive the account-specific Shopping Rewards offer within 30 days after all requirements are completed; purchases are not required. Rewards are not cash and are redeemable only for eligible e-gift cards. The referral payout maximum and current account offer control.