They way you used it is exactly how it should be used. Private owner, FISBO and Zillow put the seller and buyer together. I'm all for that.
But Zillow is demanding from the courts proprietary data, their business model is to leech/commandeer data from others- who worked for it.
If this is true, and they are trying to profit off of others work products, I understand your issue with them. Thank you for clarifying.