I understand your point, but we have to maintain a huge amount of OSS and also provide human support when needed. That's why it's not free.
FYI we do publish most of our stuff open source on GitHub (
https://github.com/elestio-examples/) and also on docker hub (
https://hub.docker.com/u/elestio). Although some companies prefer to pay us to get peace of mind and a strong DevOps team to help them when critical stuffs going wrong