You can top up your Amex wallet(s) fee free for up to £1000 a month. Thereafter you will be charged a wallet top-up service fee of 0.65% of top-up amount.
Each Amex payment card has a separate Amex Wallet. During the Closed Beta Programme, you will only be able to add one Amex card to Curve. We are working to allow you to add a second card, however there are no timelines for this during the Closed Beta Programme. Please note that the £1000 is cumulative across your Amex wallets (and is not per wallet).
For more information, please see the Curve Amex Closed Beta Programme Terms and Conditions.