One also has to admire Whitstable man's marketing genius if he's able to live of his $100 "wallets" (which mostly amount to two badly sewn together pieces of leather). This article feels a bit too on the nose though. But he probably knows his audience.
They're really more like card holders, but I looked up that term and found they've now been rebranded as "minimalist wallets." Hey, even minimalism can be commoditized and sold. All that is solid melts into air after all.
A lot fewer people regularly use business cards and a lot more people rarely use cash or need to carry a lot of cards with them given they can store info on their phone. I carry one made by Saddleback and it's perfect for me.