I can offer a clue.
Discover was Sears’ in-house charge/credit card. It got spun off by itself but a lot of companies never really started accepting Discover.
American Express, their whole thing is exclusivity. It’s the card you use to pay at fancy places. They charge merchants more in service fees, so a lot of places just don’t do business with them.
Blackmist@feddit.uk 8 months ago
Lower fees.