Open infrastructure is hard to monetize. Old school robotics players have a playbook for this. You may or may not agree DBs are infra but Oracle has done well by capitalistic standards.
The reality is in our economy exploitation is a basic requirement. Nothing says a company providing porcelain for Linux kernel capabilities has a right to exist. What has turned into OCI is great. Docker desktop lost on Mac to Orb stack and friends (but I guess they have caught back up?) the article does make it clear they have tried hard to find a place to leverage rent and it probably is making enough for a 10-100 person company to be very comfortable but 500-1000 seems very over grown at this point.
Really should not have given up on Swarm just to come back to it. Kubernetes is over kill for so many people using it for a convenient deployment story.