Thanks! We actually don't get much traffic from search engines. Mostly all through direct and social, with a few spikes due to HN. The product URLs listed on Agora aren't indexed by Google currently as we don't facilitate purchasing (i.e. like how you'd find a product sold on Amazon when doing a Google search).
Generally, Google Shopping shows big retailers or ads. E-commerce stores have a tough time competing against these big retailers, on both Google Shopping and a normal Google Search.
That all said, we are running tests to track engagement of a "search result page" indexed by Google or Bing. For example, searching for a "backpack" and then landing on the below link with selection to choose from.