Following on from your links, if I understand it correctly, Pushpin: https://pushpin.org/docs/about/ is essentially an open source version of your service that you support (I presume you alluded to this in the interview as "OSS is a good driver of traffic for us").
I believe that is a great model for smaller SaaS companies to follow, as it reduces a lot of the risks ("use our service to reduce your time to market. If you don't like it later on, here's your out."). Great stuff!
When I'm on the buyer side, often one of my top concerns is understanding how I could potentially stop using a thing. Usually this comes down to selecting tools based on open technology.
I believe that is a great model for smaller SaaS companies to follow, as it reduces a lot of the risks ("use our service to reduce your time to market. If you don't like it later on, here's your out."). Great stuff!