system
A chat on subreddit /r/wallstreetbets
human
There are already companies doing 'cool data-analytics' for pennies.  
 Zillow is not innovating anything, its just using existing data and applying some user interface to this data because the RE technology is outdated and they took advantage of that. That is changing as agents are getting better and understating Zillows scheme.

gpt
But don't they do value estimates based on sales figures.  I dont think any other service does that as well as zillow.  MLS just has the listing data.