Thats a really big deal, how did they legally managed to do the license change? I was under the impression that only works if the original owner is the doing most work
Copyleft protects against that as a general rule. However some projects that rely on copyleft require contributors to sign license agreements granting the project owners a more permissive license.
Almost all of these license changes just change the terms under which _new_ work is contributed - which is why many of them have forks from the last OSI-licensed commit.
Since they're a for profit entity, they'll do whatever they think offers the best cost/benefit.
But it’s ok to be voluntarily grateful for hard work.
You don't become a billionaire using that approach though.
I can't just translate Harry Potter to Spanish and sell it.