The battle over real estate listing access and seller choice took a big turn last week when Zillow announced Zillow Preview, a pre-marketing program that allows sellers’ agents to advertise listings before they’re entered in the Multiple Listing Service. In Chicago, the rollout comes amid a fierce turf war over the control of early inventory. Zillow has taken issue with Midwest Real Estate Data’s Private Listing Network, an MLS option that allows agents to advertise listings to other MRED participants, bu ...