[j1elo]

Changing the license of already existing code? You might not be able to do that without permission from other contributors, I agree.

But it's MIT license. We can open a company tomorrow, take that code, and start selling it. Further development and improvements of the code could be trivially done openly or behind closed doors. FWIW the author themselves could do that if they wanted.

[spockz]

If “we” can do it, the original author should also be able to do it. However, I’m not sure whether the MIT license is enough to waive intellectual property in all jurisdictions, meaning that some contributions are still owned by the contributors themselves, especially in certain jurisdictions.