Sometimes your biggest challenge for growth is not that people are not using your platform, but they are just using it wrong:
Insight: The challenge is not that people don´t have stuff to sell, but they don´t know how to sell that. The pictures look bad, there is not that much story behind the stuff and everything lacks enthusiasm. If you are marketplace where people can sell their old stuff this is naturally a problem. You want to make people better sellers so their stuff moves faster and they can sell even more stuff. More stuff equals more money to everyone.
Would you notice a used product ad featuring Dolph Lundgren?
I know that I would.