What is the ruling on subscribing to a company that operates on a business-to-business (B2B) exchange system, and takes 5% from both parties (seller and buyer) for this service, in addition to a one-time registration fee?

It is permissible to issue credit cards if they adhere to Islamic legal guidelines. It is permissible for the card issuer to take a fixed sum upon issuance or renewal as a fee for its services. However, it is not permissible to take a percentage from the cardholder for each sales transaction. It is permissible for the card issuer to take a commission from the merchant for the customer's purchases, under certain conditions.