I have heard this point of view and truly don’t understand it. There were companies making money with an open source tool. That’s what some companies do, and the license allowed for that. They weren’t taking; they were using a tool, and providing a service upon it. If anybody is taking, it is Hashicorp from their own community that contributed thousands of hours to their business for free.
And those companies you refer to tried often to push upstream but Hashicorp just refused contribution time after time.
That said I understand it too. Insofar as capital investment demanded the cornering of a market and miscalculated the likelihood of a well backed fork. As a result I think, they probably sealed their fate even if it takes many years. How many people remember Hudson?