You can pay on the site using credit or debit card, Afterpay /ClearPay (US, Australian, Canadian & UK customers only) or via PayPal if it is available in your region. If you select to pay with card, you can pay with Visa, Mastercard, Diners, Discover, Alipay, and American Express (available for USD only).
Payment can also be made via Gift Certificate, however Gift Certificates are only issued for marketing purposes and cannot be purchased as yet.