By Lincoln Murphy, Managing Director Sixteen Ventures http://sixteenventures.com “Quality in a product or service is not what the supplier puts in. It is what the customer gets out and is willing to pay for.” – Peter F. Drucker, Innovation and Entrepreneurship SaaS and Web App companies often charge their customers based on usage in an ongoing or recurring fashion. This can be subscriptions, usage, credits, etc. and is generally their primary revenue stream. This…