Traditional real estate brokerages that display housing data through MLS may have a fight in their future, Inman reports. The publication notes that newer online companies are signing onto multiple listing services to get MLS data online, but they still don't provide clients with traditional brokerage services.

Inman says the new model survives without a fight:

[O]nly if the traditional brokers who control the nation’s MLSs continue to tolerate them. Traditional brokers can opt out of providing their listings to national listing portals like Zillow, Trulia and realtor.com