Look, author has 1 or 2 cards. I have an Amazon card, a Target card, a Debit card, my FSA card, my Company credit card. I have rewards cards that I don't keep in my wallet because I like to keep my wallet thin.
Like it or not, Coin presents a hopeful solution to solving this for me. And don't go telling me I need to reduce the number of cards I have and simplify my life. I don't want to hear it. I just want Coin's product to exist and hopefully my pre-order is helping that.
On a side note, I'm not used to charge first ship later. Isn't Coin YC backed? I'm surprised they need to rely on pre-orders for funding unless that was their financial plan all along.