If you're a dev who doesn't value your time it's free! Otherwise it costs you many hours of market research to see if your product is viable. Many hours of des

If you're a dev who doesn't value your time it's free! Otherwise it costs you many hours of market research to see if your product is viable. Many hours of design and testing to determine if your product is useful/liked by customers. In comparison, the running costs are orders of magnitude less than what you will waste building and launching the product.