As we use recurring card payment for myLIMITLESS. You will need to have a credit or debit card as your default payment method for myLIMITLESS.
You are unable to use gift cards to sign up to myLIMITLESS, however there are specific myLIMITLESS gifting codes available to buy, these are for a set price and are for annual memberships only.
You can buy a myLIMITLESS gifting code here.