Source available from the beginning is ethical. Open source that becomes something else is shady. I am glad they tried. I know there's lots of cynical stuff on the internet, but realistically the open source progress on stuff like Terraform or similar wouldn't have happened if these companies didn't try an alternative. I'm not sure what people want these companies to do. If there's no money, if the idea didn't work,…
If you do actual open source and your product is any good, somebody else is just going to repackage it and sell it, either as SAAS/IAAS or as a boxed product. So why not get there first? It's depressing. That's been my experience every time I gave code away, at least. Somebody else made money off it.
We have seen maintainers burnt out. It takes work to write code.