Cryptocurrency mining rigs are just PCs — so why won’t Stripe let you sell them?

At the end of 2017, and the height of the cryptocurrency craze, Noah Katz decided to start a mining rig company called Artesian Future Technology. His plan was simple: he would make custom computers for people who didn’t have the time or know-how to do so on their own, but wanted to enter the wildly volatile field of cryptocurrency mining. However Katz’s offering quickly reached stratospheric prices: the basic computer he sold cost $1,899, but customers could fill it with GPUs somet