The app is failing atm at what it should do for the users, i. e. show them what they want or need in the fastest way possible. This is the secret of Amazon and the other online stores... they store your preferences and other metrics regarding the user and when you return you are greeted with what interests you.
We're not copying Amazon, but for now we have categories that a user can use to filter listings.
And, of course, we're still new

There is much work to be done.