Get paying customers or written commitments from a good amount of customers to validate your business model. Otherwise you may find yourself without a job, and

Get paying customers or written commitments from a good amount of customers to validate your business model. Otherwise you may find yourself without a job, and a product no one wants to buy. If no one will give you money or written commitment, but say that they will buy, they aren't a customer. It's their polite/non-confrontational way of saying no