I'm also curious. First things that pop up in my mind : 1. Hiding javascript one level more ( slightly harder to find what is going on than uglified JS ) 2. A

I'm also curious. First things that pop up in my mind : 1. Hiding javascript one level more ( slightly harder to find what is going on than uglified JS ) 2. Avoiding some script blocking scripts ( imagine ad-blocker that is not configured for such javascript option ) 3. Saving traffic by putting javascript in the same request as an image resource that you are actually using.