The same way companies grew before there was the Internet — boots on the ground, people-to-people networking, outbound sales outreach and time.
For any Marketplace platform to function & grow well both sides of the user base needs to be developed in tandem. Initially depending on the service the Marketplace is trying to provide, it is important to focus on users that will provide the service. Uber: Drivers, Clarity: Experts, eBay: Se...