https://medium.com/@jgolden/four-questions-every-marketplace-startup-should-be-able-to-answer-defb0590e049

Summary:

All Marketplaces are not created equal

Great marketplaces do not simply aggregate a market; they enhance it

They leverage the connective tissue to offer the consumer a user experience that simply was not possible before the arrival of this new intermediary

7-8/10 is a great start. It's about Execution. Great marketplace execution is more nuanced and less systematic than other venture backed categories, and for every successful marketplace, you will find an amazing entrepreneur that out-executed the many others that had chosen to attack the same market. In addition to great marketplace characteristics, you also need a world-class entrepreneur to make the dream come true.