For that analogy to hold, PadMapper would have to be pulling data from a large number of sources. The value that Google News provides is that it aggregates a very large number of sources. PadMapper does not.
It does.
Look, it's obvious that even PadMapper believes Craigslist is THE data source they must have.
Google News could drop any given data source and not blink. PadMapper simply is not in the same position.