> Stealing these components would be a very shitty thing to do, but I'm wondering as to how the authors can protect their CSS library from piracy I used to sel

> Stealing these components would be a very shitty thing to do, but I'm wondering as to how the authors can protect their CSS library from piracy I used to sell GPL licensed Joomla extensions and themes. Short answer: you can't. Long answer: You just can't. People who're going to pirate your work aren't your customers and weren't going to pay anyway.