Because, as your article points out, in the US there is a requirement for consideration. Sure, the GPL might be a contract somewhere outside of the US but who cares? The ruling was in California.

I like how correct comments like yours around here every time gpl comes up are downvoted to oblivion. shows there's load work to do from the eff to educate people at wtf gpl is

Well, that's what happens when people use wrong terminology and instead of explaining or suggesting fixes you just go "nope, you are wrong, every X is Y because Z says so". And I didn't downvote this post, btw.

On a tangential note, there's also a load of work to do from somebody to educate you wtf EFF is and why it doesn't care about the GPL and who actually does care ;)