These fees are billed at the end of each period, at the same time as your bsport invoice

Stripe charges the Customer 2$ per month for enabling, processing, monitoring, and managing online payments through their services

International fees are based on the currency of the bank that gave you your card.

You will have these fees if the bank has a different currency to the one you are going to make your payment in.

E.g. AMEX may come from a French bank and therefore have local fees for payments made in Euro.