It's not merely "the same content", it is content automatically sourced from Craigslist, and while that may seem like a picayune distinction, it is not.

It's not automatic. A user has to click a button on his bookmark bar for it to happen.

CL seems to have a stone age version of automatic. A cave man would think a cigarette lighter automatically creates fire, but it just technology that's improved.

Instead of rubbing sticks together for a half hour we can make fire with flick of our thumb. We still had to do something.

Higher productivity != automation and shouldn't be used as an arbitrary measure of legality.