This is the most common way for an online marketplace to make money. A seller pays a predefined % only when they make a sale. This monetization strategy is best for small transactions. Uber and eBay work like this, for example. The platform usually gets a commission fee of 5-15%.

Choose this model if you don't want to depend on the sales volume. Just charge your users a small fee every month or once a year. You can also have different subscription packages. Offer limited functionality for free and the full package for a monthly fee, for example. Or charge only the vendors. Or only the clients. You get the idea.

If your marketplace has a lot of traffic and active users you can implement a listing fee. A user can place ads for free. If they want their ad to be placed above all the free ads from other users they can pay for the placement.

This is a common monetization model for a service marketplace. There is a fee to contact a customer, while no one guarantees a successful transaction. In this case, the vendor relies on long-term cooperation with the client.

A pay-per-action revenue model implies the vendor has to pay a fixed amount when a client performs an action. For example, when a user books a table in a restaurant through the marketplace, the restaurant pays a fixed fee to the platform.

You don't have to stop at one monetization strategy. Many marketplaces use a combination of multiple monetization strategies. The ad-vantage of the mixed model is that it creates additional value for some marketplace users. While not interfering with everyone else's work.