By Michael H. Keller and Taylor Lorenz, The New York Times A popular technology company that has helped launch thousands of online retail sites has become a favorite tool for fly-by-night businesses looking to cash in on the coronavirus pandemic. New e-commerce sites that use the company’s services are filled with wildly exaggerated claims about virus-fighting products that may not even exist. The New York Times analyzed registrations with the company, Shopify, which allows just about anyone with an email address and a credit card to create retail websites in short order.