Check with store they are tied together and I thought they did. Its just displayed
This is the answer I found on google: Costco came up with an even more strategic way of saving money—a lot of money—by striking a deal with Visa. The warehouse club agreed to accept only Visa cards, and in exchange, the credit company lowered Costco's merchant fee to a negligible less than 0.4 percent.Jan 6, 2020
COSTCO HAS AN ARRANGEMENT WITH VISA! CASH, CHECK(W/ID) + VISA ONLY!
Thanks! Your answer is awaiting moderation.