They still have to pay for servers and maintain the model itself. A neural network isn't just the data -- training and commercializing it (testing, QA, etc) is

They still have to pay for servers and maintain the model itself. A neural network isn't just the data -- training and commercializing it (testing, QA, etc) is a lot of work. You wouldn't have an issue with someone making money by using open source software (like a website that is hosted on a server running linux).