I think their point was that it was the first card of its kind outside of American Express. Back in 2016 there wasn't anything else really like it other than Amex's high tier cards. It also had a really generous sign up bonus when they first released it, 100,000 points if you spent a certain amount on the card in the first few months. Since then other issuers have been playing catch-up so the CSR stands out less.