Permissive licenses don't protect against projects that decide to change the license when releasing a new version.

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.

> 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

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.