Most open source maintainers never “license [any] stuff you maintain for big bucks” that is often hard to do and/or goes against the philosophy of open source entirely.

Uhhh... no this is actually very common. Usually with scaling licenses, "free for use if your company is below [threshold]", its super common...

And I don’t even think this is malicious behaviour as it just nukes the code of this package and nothing else if you are not being careful yourself…

Are you even reading what you just wrote lol.

Being "sorta" malicious is still malicious. And companies usually have zero tolerance for that shit.

If you don’t do version control you are not a good programmer, imo

You really underestimate how much damage this could do then, lol...