One by one, they go to start their business day only to find a baffling message from their payments app informing them: “You can no longer do business with PayPal.”There is little or no explanation. They have somehow offended the sensibilities of someone somewhere deep inside the bureaucracy. They are simply told via an email from PayPal’s Risk and Compliance Department that, after an internal review, “we decided to permanently limit your account as there was a change in your business model or your business model was considered risky.”In case there is any doubt, the email adds: “You’ll not be...