I agree. My first startup I worked on while in college was "beating cragslist." We looked at it and laughed and said this is so old! As we went about our business, we realized there was no way we could reasonably change the world's habit of going to craigslist for {X}. That was ~8 years ago and it's still going strong.

Many a start-ups have come and gone trying to revolutionize house/apt hunting. If they try to incorporate craigslist, craigslist shuts 'em down; if they try to get organic listings, craigslist beats 'em.