The same set of people who would move their price points up after a few months and get larger mortgages. This worked for all of 2020 and most of 2021 and only the past quarter did it fail as a strategy.
>Buying things you think are underpriced and reselling them is not frontrunning. (Ever since GME, a lot of people learned the word frontrunning and started using it in every possible situation.)
You're missing that this is Zillow, not a neutral market actor. They have unique information about demand for houses and even get to influence prices upward through Zestimates.