You also expressly grant and assign to CL all rights and causes of action to prohibit and enforce against any unauthorized... How is this in effect any differe

You also expressly grant and assign to CL all rights and causes of action to prohibit and enforce against any unauthorized... How is this in effect any different from a non-exclusive license? Are they going to ask each person if they gave permission for something that was cross posted multiple places? At least now people can post an ad to multiple place, but CL wants to make sure that they aren't crawled? If I were CL, I'd be more worried about losing Safe Harbor protection than whether or not I owned user submissions.