A hard lesson for them that listing aggregation & analysis of the market is far different than direct investments & flipping. Flippers take a big risk and offset inevitable losses on some homes with the profits on others. And generally if they do well it has a lot to due with deeper knowledge of the subtleties in the local housing market & partnerships with realtors that have customers in the pipeline already. There's a lot more to it than what might appear on the outside to "tech disruptors", or anyone else who thinks it looks easy from the outside.