When I read about mid-stream license switches like this, the term bait & switch comes to mind. It seems unethical.

People bought into the product based on various factors, one of which may have been the license. They put hundreds or even thousands of hours into integrating that product into their environment. Then someone pulls the rug out from under them.

That Hashicorp were accepting community contributions from people who will never see a monetary return on that investment —- while Hashicorp makes money on their work —- adds insult to injury.

Businesses who use that kind of tactic are not high on my list of people to give my money to.