No, seriously, it's perfectly sensible. Casual users will just smile at the licence, use the code, and move on. Corporate users will probably throw a fit when they see the licence, and then get their lawyers to negotiate something that suits them better. Crockford can either just say "OK, I license you to use this code for evil" and get a nice story to tell, or charge them money for a different licence. It's a way of getting a little control over "major" uses of the code, while not getting in the way of casual uses. Oh, and did I mention that it's also hilarious?