Between April and June of this year, Zillow bought nearly 4,000 homes. And they had no intention of holding onto them. The plan was to flip houses, often and at scale, joining the ranks of companies like Opendoor and Offerpad, also known as iBuyers.  So, why did Zillow put their plans on pause last weekend? Can online middlemen really change the way we buy and sell houses? Guests:  Tony Santos, homeowner Patrick Clark, reporter at Bloomberg Host: Henry Grabar Learn more about your ad choices. Visit megaphone.fm/adchoices