The retailer pays a percentage of the purchase price to the pay-over-time provider, just like they pay a transaction fee when a customer swipes their credit card. Eligible American Express cards include the Business Centurion Card, The Business Platinum Card ® from American Express, American Express ® Business Gold Card, American Express ® Gold Card, Business Green Rewards Card from American Express, and American Express ® Green Card. Eligible American Express cards include the Business Centurion Card, The Business Platinum from American Express, American Business Gold Card, American Gold Card, Business Green Rewards Card from American Express, and American Green Card.