I agree with your general explanation of the challenges. I like the example Automattic sets. They give away the WordPress engine, but also run it as a subscrip

I agree with your general explanation of the challenges. I like the example Automattic sets. They give away the WordPress engine, but also run it as a subscription service. Running software is hard, and there are plenty of people that will exchange money for an SLA, both service availability and support response time.