Yelp is up now.
I'm glad the person currently speaking who actually understands technology (seemingly) and worked on antitrust law suits knows what she's saying.
Not that I like Yelp however ლ(ಠ益ಠლ)
the analogy is more like that of a car manufacturer gaining 90% market share, designing the interface between it and its seats to be proprietary (and preventing other manufacturers from learning about it except through a business agreement with them), then getting into the seat business and making it clear that third-party seat manufacturers make inferior products.