Margins are probably not the main factor. Even in spaces with large margins, if the market is winner-take-all, then bad behavior from founders can make the diff

Margins are probably not the main factor. Even in spaces with large margins, if the market is winner-take-all, then bad behavior from founders can make the difference. Think Uber playing dirty tricks on Lyft. It's not about margins, it's about building a monopoly and eliminating the competition.