The reason why it fell mostly in disuse nowadays is because jshint appeared, which allowed a lot more customization of the available rules being applied.
Later eslint popped up with it's plugin engine allowing anyone to have their own custom set of rules.
As far as I know, no one cared about jshint's license because there was no code being shipped, and eventually code would be minified anyway leaving no traces of jshint.
Now... We can talk about the morality of ignoring a license, but ultimately jshint's license was simply ignored by almost everyone
The reason why it fell mostly in disuse nowadays is because jshint appeared, which allowed a lot more customization of the available rules being applied.
Later eslint popped up with it's plugin engine allowing anyone to have their own custom set of rules.
As far as I know, no one cared about jshint's license because there was no code being shipped, and eventually code would be minified anyway leaving no traces of jshint.
Now... We can talk about the morality of ignoring a license, but ultimately jshint's license was simply ignored by almost everyone