I think this is a bit disingenious. Google indexes the entire web, not just a specific subset of it that it can hopefully in the future turn a profit by supplanting Craigslist (ie links and leads to Padlister). This is why you see CL allowing Google to index their website. If CL thought Google was going to spin up apartments.google.com relying off the back of CLs data you could probably expect a lawsuit there also. It's all about context and to suggest otherwise is just trying to find a way to profit off the back of another company who has already done the legwork.