From way back in 2008, David Heinemeier Hansson of 37signals.com, describes in his imitable way on how to make money
Summary: Get people to sign up for a product, they pay us every month, if they continue to like the product they keep paying.
About the author
Alex is a pioneer in using the cloud to meet the needs of small and medium sized business (SMBs) and membership-based organizations. He has a BSc in computer science from the University of Michigan and has worked as a product manager at two Internet startups. Alex is a father of 2 and plays the trumpet for fun. He is the founder and the president of the University of Michigan Alumni Club of Toronto.