...this does not legitimize anything in particular. It says it's OK for users to post ads on multiple sites, not that other sites can scrape CL's user content.
This is akin to freelance contract work: if you're a news photographer, there's usually a clause saying that while you can own your photos, you may not sell them to your client's competitors (at least right away).
So CL is saying to its users: Go ahead and copy and paste your stuff to other sites. So, not a huge difference by any means in what most users assumed.
PadMapper was doing the cross-posting to PadList to slowly build its user base. I however did not realize that Craigslist frowned upon that until the change in the agreement.
