> pre-existing market with network effects. (a phenomenon whereby a product or service gains additional value as more people use it.)
Google has network effects as well as they own Android dialer, hangouts, google messenger, and email. I don't buy this argument. They just failed.
Also you'd be the first person I'd see that defends Yelp's business model, but yeah I'm not familiar with the Google vs Yelp court case.