BizSugar.com › Startups › A Valid Business Model Requires Real Customer Sales

“Will the dogs eat the dog food?” This rather crude expression weighs heavily on the mind of all good startup founders, no matter how confident they appear. We all know the products they give away, and the ones purchased by family and friends don’t count. The real milestone, proving the business model, is that first product sold for full price to a total stranger, leaving him happy.