There are complex issues.
The “realtor.com” website used to be too slow to use.
They’ve made it very nice now. Therefore, third party websites aren’t as valuable to home buyers.
However, no monopoly should be able to extend its monopoly by monopoly power.
AT&T had to license the transistor.
RCA had to license color TV.
In Britain, third party websites like Rightmove and Zoopla rule the roost.
Zillow is useful in that it allows for searching by build date, so old houses for sale in say Loudoun County, Virginia are easy to find.
The selling agent should have to power to easily place information on his client’s property on appropriate websites.
Agents have always been and always likely always will be free to enter listings into Zillow. Anyone can.
That's not what Zillow wants. If they get THAT, they're done.
That site can be obnoxious. You can't filter out costly intrusive HOAs...So the visitor is forced to go through all these proprieties they don't even want! That's BS.