Many years ago a guy i know was going to open an auto repair shop. Nothing fancy, just an import shop.

AMEX, at the time, offered him a plan where if he wanted his money in one month they kept 50% of the amount. If he wanted it in six months they charged him zero.

So he just went with the credit cards his bank set him up with and finally started taking AMEX when he could afford to carry them for six months.

I guess COSCO was tired of not having quicker access to their money?